I've left several forums when I no longer wished to be part of them.
Sometimes because I could not get along with one or more other members. I know that shocks some of you to hear
Sometimes because I recognized that the things being said were sufficiently distressing to me that they were causing me problems in my personal life; my problem, not anyone else's problem.
Once because I was actually being harassed at work by a fellow forum member who took it upon himself to track me from employer to employer and complain to management about the things I said online (yes, seriously, and I lost a job over it too).
I haven't been banned from a forum, but I don't doubt that it could happen in the future; I tend to be blunt and my humor doesn't always translate well online.
In any case, however, I don't like to do the
"I'm taking my toys and going home and you'll be sorry when I'm gone" speech. I just leave. Likewise, when others leave, I don't spend a lot of time worrying about it if they're not also pals in meatspace. I just assume they have their reasons, and if they wanted me to know them, they'd tell me. Since they didn't, I figure that's the way they want it, and that's perfectly OK with me.
Sometimes I leave a forum for awhile to think about things, such as my own behavior, or my responses to certain things being said online and how it affects me. Maybe it's not healthy for me to be there; or maybe I need to modify my outlook in order to participate without it being unhealthy for me. If that happens, sometimes I get my stuff together and decide to come back. Sometimes I do not. In any case, it's never a case of stomping off in a huff. It's just time to move on.
I like it here, don't want to leave. I've made a lot of good friends here, including meatspace friends. I'd hate to leave that behind. If it happens, however, life goes on for everyone involved. Unless I kack it, in which case, my RL friends should please help Mrs Wiggy sort through my audio crap and toss the dross (which is most of it) and my shade will be most appreciative.