I think you're probably underestimating how overrun some of these subreddits got. A lot of the piracy and roms subreddits get so overrun with questions like, "Will downloading Pokemon Blue on Vimm's Lair give me a virus?" they became unusable.
That's not to say I'm defending the regulars and mods on a lot of these subreddits. I noticed before that many regular /r/piracy users recommend against some torrent sites because they have misleading ads that lead to malware, indicating that they don't have any kind of adblocker installed. That shows you how deep the brain trust is on a lot of these subreddits.