Not in completely open communities, no. It would be better to gatekeep political communities with precisely worded "principle" questions and then flag for viol

Not in completely open communities, no. It would be better to gatekeep political communities with precisely worded "principle" questions and then flag for violations of those for anybody who slipped in under the radar. Even political communities where everyone is nominally on the same page do break down over issues of tone, disingenuous arguments, etc. though.