user3615: For me, it is quite irritating when I have to wait for the reply to a comment thinking that the person is online. I often check the profile for knowing if a user have logged in recently but  have no way of knowing whether someone is online "right now"
What do u guys think about this ? Do u think we should have something like facebook where we can see who is online ?

user25568: Though there is plus-sides, there is minus sides of it, too. IMO the present chat rooms are enough, and there is no extra need to show off anyone's presence. 
Because-of 

1. It causes distraction:
It would be rather irritating to get to know when the other users are online and showing other users when I'm online. It will kill the focus to write a question or answer, and also may encourage spam and junk. 

It is very okay and nice that when users get time, they come, reads the q/a and comments, and leaves their response accordingly. 
Also I love very much a side of SE network, i.e. it is not obsessed to persons, but to subjects. I do not have to compulsorily share any personal details or academic credentials, (just like I do not need to tell when I'm present or not). Similarly I can't follow a person but can follow a tag. But in urgency, can leave a comment to anyone, no matter of 'friends list'. 

2. It may cause a trend to ask a question only certain user is present; thus may reduce the reach of the question, and will  also the diversity of the answer 

I do not think there is any need to address a question to an individual from the moment of asking. if a question get quickly received by 1 or a limited number of users, quickly accepted; and then get dumped as answered. And just solving someone's question is not the purpose of this site. The purpose is how-much the world can receive and use the knowledge you shared, for future.
If a question stays unanswered for a longer period, say a day or few days or an week; peoples from versatile backgrounds will get to visit it while browsing, and will try to solve it in their own ways of thinking. Also the question will get more reach, attention and care. Simultaneously, peoples from specific field, too, would come to the question while they will search questions by the tags they are interested in. Even it could happen; whom you were thinking to knock, will show a distraction to the question whereas a person from some other field would give you a satisfactory answer. 
What I prefer, is to submit a question, and temporarily forget it (and doing own works). Later-on I check, in which way it grown. Or what surprises waiting for me. 

user5006: You can see who is in chat. Maybe the solution is to encourage people to use chat more (which is good since it is more accessible than comments).
In general, I would like for the software to allow for more one-to-one communication in order to keep the comments on topic, but that seems like it would be a major change to the software that is used by all of StackExchange (as I understand it)

user3624: I do not see the point. People respond when they have the time and knowledge to do so. Adding this kind of feature would/could also shift the focus of SE from good objective answers to personal relationships between users. I would personally dislike such a change, and there would have to be an option to opt-out of public online status. However, I do think (along the lines of @adam.r) that a way to contact users throught personal messages could be useful. 

3615: <p>For me, it is quite irritating when I have to wait for the reply to a comment thinking that the person is online. I often check the profile for knowing if a user have logged in recently but  have no way of knowing whether someone is online "right now"</p>

<p>What do u guys think about this ? Do u think we should have something like facebook where we can see who is online ?</p>
 25568: <p>Though there is plus-sides, there is minus sides of it, too. IMO the present chat rooms are enough, and there is no extra need to show off anyone's presence. </p>

<p>Because-of </p>

<ul>
<li><p><em>1. It causes distraction:</em></p>

<p>It would be rather irritating to get to know when the other users are online and showing other users when I'm online. It will kill the focus to write a question or answer, and also may encourage spam and junk. </p></li>
</ul>

<p>It is very okay and nice that when users get time, they come, reads the q/a and comments, and leaves their response accordingly. </p>

<p>Also I love very much a side of SE network, i.e. it is not obsessed to persons, but to subjects. I do not have to compulsorily share any personal details or academic credentials, (just like I do not need to tell when I'm present or not). Similarly I can't follow a person but can follow a tag. But in urgency, can leave a comment to anyone, no matter of 'friends list'. </p>

<ul>
<li><em>2. It may cause a trend to ask a question only certain user is present; thus may reduce the reach of the question, and will  also the diversity of the answer</em> </li>
</ul>

<p>I do not think there is any need to address a question to an individual from the moment of asking. if a question get quickly received by 1 or a limited number of users, quickly accepted; and then get dumped as answered. And just solving someone's question is not the purpose of this site. The purpose is how-much the world can receive and use the knowledge you shared, for future.</p>

<p>If a question stays unanswered for a longer period, say a day or few days or an week; peoples from versatile backgrounds will get to visit it while browsing, and will try to solve it in their own ways of thinking. Also the question will get more reach, attention and care. Simultaneously, peoples from specific field, too, would come to the question while they will search questions by the tags they are interested in. Even it could happen; whom you were thinking to knock, will show a distraction to the question whereas a person from some other field would give you a satisfactory answer. </p>

<p>What I prefer, is to submit a question, and temporarily forget it (and doing own works). Later-on I check, in which way it grown. Or what surprises waiting for me. </p>
 5006: <p>You can see who is in chat. Maybe the solution is to encourage people to use chat more (which is good since it is more accessible than comments).</p>

<p>In general, I would like for the software to allow for more one-to-one communication in order to keep the comments on topic, but that seems like it would be a major change to the software that is used by all of StackExchange (as I understand it)</p>
 3624: <p>I do not see the point. People respond when they have the time and knowledge to do so. Adding this kind of feature would/could also shift the focus of SE from good objective answers to personal relationships between users. I would personally dislike such a change, and there would have to be an option to opt-out of public online status. However, I do think (along the lines of @adam.r) that a way to contact users throught personal messages could be useful. </p>
