If the cult doesn't vote or is overrun by engaged normal people, then we can dismisss them as that father did his family. Cults aren't necessarily known for their majority rule (exposing them to the public is often poison to them).

People engaged in going to townhalls are absolutely a great measure of what will actually happen at the polls. Especially in non-national elections which often have a small fraction of turnout and a few hundred votes can swing an entire election.