I've avoided this so far, but since we seem to have moved into more theoretical (and thus less minefield-ridden) territory... and admittedly in a blatant copy of Steffie... I'll throw out my personal take on communities.
I'll open by saying that I am a loner. I didn't interact with anyone my own age until the age of 12 to any meaningful extent, first went to school at 14, and now at the age of 23, I could probably count the number of IRL friends (as opposed to friendly acquaintances) I've had in single figures. My current IRL friend list (defined as people I semi-regularly see offline, I've met a bunch of you weirdos but you're still online friends by my definition
) is... one. I'm nowhere near as shy as I once was, but I'm not a social animal.
I'm also virtually bulletproof. I have a lot of layers of armour and only two people in my life have seen my core - most people, even friends, are lucky to get through my shields, let alone to hull. I am very much of the 'no fucks given' type, because a lot of the time, I don't give a damn what people think of me or what I do. I'm quiet, polite and will happily chatter away with people, and most people seem to like me, but I do it just because that's how I was raised, not due to some need for affirmation.
My fiance is rather less bulletproof. We actually had a talk recently about confidence and the ability to handle a new community and new group of people, and even though she is apparently a far more social creature than I, I was surprised to realise that I'm far better at integrating into a new situation (when I decide to make the effort, but that's another story). I actually found it hard to grasp how much anxiety she was describing about simply saying 'hello' to new people.
I've dealt with a number of communities. The gaming group that I was part of before I hooked into the RP crowd here was a bunch of people who I used to play Freelancer with (ironically enough, we were mortal enemies there. Go figure), who were a fairly straightforward bunch. Apart from a couple of vaguely language related snarlups (mostly a Germany-based clan where not all of the members were that good with English, cue misunderstandings and accidental rulebreaking), I don't remember there being any real problems.
But I've also been part of a freeform roleplay community which self-destructed and recreated itself at least three times, each more spectacular than the last and which was largely populated by dramabunnies, a forum-gaming setup that has been witness to a couple of explosive meltdowns, and seen a decent slice of human nature along the way. I never witnessed this mysterious and malevolent entity we call 'the Community' at work, but to be fair, most of the situations were either less cooperative, smaller, or both.
That said, I'm inclined to agree with Silas that in general, if someone gets into bad drama, it's probably their own fault. However, from what I've seen, this community does tend to be pretty unforgiving at times. Whether deservingly so isn't for me to say.
For myself when it comes to Seri, I have to approaches to dealing with people. The vast majority of the time, I take them as they come, totally neutrally. Unless they actively become hostile, I'll be polite and just move on, and I enjoyed the interaction, might make something more of it. If they become hostile, I jettison all fucks and whistle as I get on with life. In a very small minority, I will take a disliking to someone on sight. I've been vindicated in every case that this has happened as to said person being Trouble of some kind.
Seri does not give me said trouble vibe. Everyone does dumb shit sometimes. He's done more than some, fine. I'd still rather interact with him than some other roleplayers I've run into in the past. I've played with a few folks in the RP community here that I've been warned are trouble and haven't had any issues. Quite often they were one-offs, but I have no regrets there.
If I have any point to make here, it's that 'give no fucks' can go both ways sometimes. Otherwise, I'm mostly rambling. Maybe that's all I'm doing. Take from it what you will.