[tptacek]

/r/BadEconomics is a fun subreddit; it's people with at least some passing acquaintance with formal economics writing snarky takedowns of economic claims made elsewhere on Reddit (or the Internet at large). It's not quite as good, content-wise, as the tier-1 subreddits like AskHistorians, but it's a solid tier 2.

[dorchadas]

Most of the /r/badX subreddits are like that. Especially the ones that require people to post why something is bad, which is all of them that I'm aware of except /r/badphilosophy, which just makes fun of the posts (and is fun in its own peculiar way).