Here’s why I’m against that: even in recent history, people have beaten and killed people for being homeless, or gay, or cross dressing, or being the wrong ethnicity for that part of town. The community’s idea of a ‘broken step’ could be my right to simply exist. There has to be a discussion on whether the behavior is actually harmful or just unlike the typical. Walking through a neighborhood by itself is not bad – not even if you look atypical. Walking through a neighborhood with, say, a political sign might be an issue in some cases but fine in others – unless the sign has easily recognized hate speech, a swastika, or such, you’d have to spend some time figuring out if your objection is legitimate.

That said, creating a community, book club, gaming group, or other voluntary subgroup can put hard limits on allowable behavior by members, and if the rules aren’t followed, you can educate violators or kick them out, but you still can’t beat them up just because they didn’t act as expected… Who’d join AA if people who relapsed were beaten for it?