Younger Dryas impact hypothesis — Currently taking a break from this controversial topic (on Wikipedia at least, still doing what I can over at Wikidata). I'm tired of people (on both sides, but overwhelmingly opponents) who are so sure of their position that they completely ignore, often ridicule, and outright suppress anything that might counter their views (no matter how reliable the source is). Trying to convince people who accuse me of bad faith or pro-fringe editing that I don't have any skin in this game, and how I just want to improve the sourcing and tame the bias in the article is exhausting.