system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: I should delete downvoted posts and comments.

Almost everyone on Reddit seems to do it like it's an unwritten etiquette rule. Whenever I go to a controversial topic or sub, there's often a lot of deleted comments with negative karma.

I have been harassed online for having a different opinion and people had reported me for that. On occasion, I get carried away with arguing with someone and took their insults personally, when I should have ignored them, and get downvoted for retaliating their insults. I go back the next day and feel stupid about being riled up over words on a screen, so I delete my comments. 

While downvotes are meant only for spam, rude comments and advertising, people tend to use it as a disagree button. I don't care too much about karma points, I think it isn't worth it to leave downvoted content as it causes unnecessary drama.
gpt
I vehemently disagree with the premise that you should censor things just because people will be uncomfortable. It's important to start arguments. It's important to struggle with concepts. It's important to offer differing points of view. For every downvoted post, there is a silent minority who is afraid to speak up but glad that someone else has validated their views.