/r/worldnews is one of the most astroturfed places on the internet. Some of those commenters are so nationalist and bloodthirsty they unnerve me. The ban hammer is extremely active on this sub, and for saying completely innocuous political statements about personal preference. I'm absolutely sure this is broader than just that sub but I've probably heard this specific complaint from probably a dozen other people too.

I will say, the subreddit system does a decent job of quarantining the dysfunction to that sub. The mod quality is everything and the mod drama is an absolute dumpster fire. (Extremely curiously, Ghislaine Maxwell seems to have been one of the most prolific of the mods, and one of her suspected accounts may be one of the most successful (karma-wise) posters of all reddit.) But on the flipside, /r/askhistorians is still one of the best resources on the internet. Many of the specialty subreddits I frequent (Aviation, UkraineRussiaReport, video game subs, several miscellaneous african subs) are still functioning fine.