What's a good sub to binge 'all time controversial'?

1. Any subreddit with politics
   — MangoMaster1231


2. /r/legaladvice
   — CalculusWarrior


3. r/relationships
   — harwoodjh






4. r/changemyview (I'm assuming you're not looking for the nasty sort of controversial here.)
   — 004413


5. Probably confession based subreddits.
   — purpleslug


6. r/Rule34
   — Hazzamo