You'd think, as a terminally online person and a moderator (not just here but I was one on some Reddit communities, too), I'd run into the super awful shit like CP once in a while. I haven't accidentally stumbled onto shit like that since I was, like, 15 and the Internet was like the Wild West.
I don't really think that's all moderators doing. There's a ton of automation in a lot of shit now that can detect CP and other illegal content and prevent it from showing up. The humans doing the job tend to be the most literal-minded dipshits that can't grasp the concept of context, satire, or sarcasm.