If it's something that you and I both witnessed in recent chat (last night?), I fully understand where you're coming from... unfortunately, what you may have realized is that sometimes those who need to hear a question like that are often the very ones rejecting it.
Yes, people are here for different reasons. Some "just to hang out" in a safe environment. That they still act out and suffer from their disorders is part of the package, at least for the time being. The unfortunate offspring from this though is they may create what feels to others as an "unsafe" place in the process.

One solution for those reading this is, when in chat, if you don't have something nice to say about another, then USE THE PM function in the chat room. Don't make your comments public. That will help maintain the safe feeling in the chat.
Having been here as long as I have (and I think others who have been here as long or longer) one thing that is enjoyable is to see members progress positively. They may arrive here battered and broken and speaking mean things about everyone, but through the time here realize they don't have to be so offensively defensive. They not only mature physically but psychosocially as well.
I find it a legitimate question you've asked.
It's a tough call I think for admin and mods to walk the fine line with members who act out. I think they do a good job. It's up to the membership to begin to think, when reading questions like this, "does that apply to me? Could I be treating others poorly here and not giving enough support?" Support needs to be given to all, not just a member's friends who join them in their acting out. From what I've seen in chat lately, a few are still too busy acting out to be able to give support to those members here they don't like. Hopefully, their journey in healing has already begun.