I dealt with a lot of user drama as an ircop on a large network. I really started to turn negative toward it (especially efnet/dalnet) when I started noticing that toxic users would basically create profiles of other users to use for trolling, blackmail or whatever else was on their imagination at the time.
You can think you're fairly anonymous but when you start having the casual conversations that IRC can lead to and a lurker is logging each users text into separate buckets they'll eventually be able to infer quite a bit about you over the 5+ years you're around casually chatting.
I'm just not comfortable entering rooms that have 50 active users and 900 lurkers anymore. This is probably a fairly paranoid outtake since I've seen these things happen, but they do or have happened and it really wasn't that infrequent back then (early 2ks).