user4651: I looked through my profile and I noticed that my activity for this stack exchange is set to "private", which means only I can see a full history of my activity on here. The community is marked as a "Hidden Community" on my SE profile.
I do not remember doing this. Was this done by default? Is this some sort of older bug?

user5078: As far as I know and can see this community is available for all to see
if you would like to check if it is hidden on your account you can do it in your profile settings 
If you go you account settings you will see a section called hide communities under edit profile you will be given a list off all the SE' you are a part of and you will be able to hide or unhide them from there 

4651: <p>I looked through my profile and I noticed that my activity for this stack exchange is set to "private", which means only I can see a full history of my activity on here. The community is marked as a "Hidden Community" on my SE profile.</p>

<p>I do not remember doing this. Was this done by default? Is this some sort of older bug?</p>
 5078: <p>As far as I know and can see this community is available for all to see</p>

<p>if you would like to check if it is hidden on your account you can do it in your profile settings </p>

<p>If you go you <a href="https://meta.stackexchange.com/users/edit/current">account settings</a> you will see a section called <em>hide communities</em> under edit profile you will be given a list off all the SE' you are a part of and you will be able to hide or unhide them from there </p>
