I once engaged with a seemingly deranged and very politically opinionated individual in a Canadian subreddit.

I later found out that person is somehow a moderator on nearly every city/town-specific subreddit across the entire country. Easily 40-50. Spending something like 10 hours a day banning people and deleting threads/comments according to their narrow view of how people should think and what news is worthy of being seen, even though they clearly had no ties to the locals.