Sacrificing a few genuine accounts to save the sanity of millions and protect democracy is not much of an issue. The question is how does one revive such accounts without too much hassle while not reviving bots.
Easy: solve 5 captchas (all known captchas of course, not 2 knowns and 3 unknowns) a day for 2 days and you get authorized again. Next violation, solve 5 captchas per day for a week. Next one, 5 per day for a month.
That could work indeed. Annoying but necessary. Tho what does one do about real bots - people in spam farms that would manually
login, post and logout.