We had one definite ideologue run here in Wilton in 2021, but he lost by a landslide.

He may try again in 2023 when the Republicans are guaranteed 2 of the 3 seats that are up due to those minority representation rules, but I expect they'll run candidates for all 3 seats, and so even if they nominate him I expect he'll get the fewest votes + remain off the BoE (unless they find someone else even worse and nominate them too). Or alternatively the Democrats may dig up somebody to run as an independent petition candidate, which doesn't count against their board representation but would reduce the number of guaranteed Republican seats.

That, incidentally, is the best way to keep people like this off the BoE - you have to both a) be a registered independent (for at least 3 months, I believe) and b) run as a petition candidate, not with either major party's nomination, but as long as you do that, you don't count against the Democrats' representation and so can take away one of those 3 seats that would otherwise be guaranteed to go to a Republican. There's no minimum number of seats for any party, just a maximum - it wouldn't break the rules for Republicans to have zero seats on the Stamford BoE as long as there were three independents.