I'm suggesting three in one because they all go hand in hand.
"IGNORE USER" FEATURE
The site needs an "ignore user" feature. If someone doesn't like what a person does or says, they should be able to just ignore that person. I say this because there are a couple of people here who would definitely prefer to ignore me, and having the option to just not see my posts could help them feel more comfortable. From time to time, I'm going to blow off steam. I've learned that I am who I am, and I just can't change for others, so better for them to simply ignore me.
"CURRENT MOOD" FEATURE
By allowing posters to select their current mood, with an emoticon and descriptive word at the top of the post, they are able to amply warn people that the post might not be one someone wants to read, whether depressing, a rant, or chew session.
"+1 BUTTON" FEATURE
I'm not suggesting a feature that allows a post to go below "0" (I hate that, and it's not conducive to a friendly site). I'm simply suggesting showing how many people appreciate the post, and that is all. This can communicate to others that a post is a good post and should be read. It does not communicate that a post is bad in any way, as such can irritate the poster and cause general disharmony.
All three of these features work together to help people feel more comfortable. If they have a person on "ignore", but then they see that the person has "+1's" on their post remnant, or that the person is in a good mood, then they can open that post to read it without worrying about seeing something they don't want to see. Because apparently no amount of warning people that a post is not going to be what they want to see seems to keep them from reading it if it's already in front of them.
Please, no discussion about me. This is a genuine suggestion and I would like it to be taken seriously.