Yep, several times over the years. It causes problems at first, because popular members have friends on forums, but eventually it settles back down again. There's a risk you'll lose a member or two, of course, but if the community is a solid one those members will also eventually return. As for what it was for, one time was for posting "adult" content on a forum that doesn't welcome it, another time was for causing problems with other members (using their "clout" to bully newer members), and still another was for constantly harassing a member for being trans. Most of the members understood each ban, some didn't, but eventually in each case things returned to normality.
