a setting where a certain political ideology predominates and people are expected to conform to the ideology and must try to convert others to the ideology. Usually refers to groups that are outside the political mainstream. Many of the people in such groups are called activists. From "activist" + "oid".
Person 1: Many sex positive folk view monogamy as literally Hitler and polyamory as the silver bullet.
Person 2: Do you live in some weird activistoidhellhole? Because outside of them, pretty much everyone assumes monogamy.
Definitions include: A topic certain to provoke incendiary response and disunity from the community it is addressed to. Even if the majority of the community would enjoy discussing it in reasoned terms, it will reveal the single-issue wonks among them.