I've been fortunate enough to have avoided those dark corners for the most part. When you've been on the Internet long enough you should have a finely-tuned system in place to avoid seeing things you know you don't want to see. Curiosity has gotten the better of me in the early days, and I've suffered for it... yeah... now, I can spot something when I see it and have the confidence to say "NOPE."
And it's true about fighting. Some accounts will destroy people if they get in a fight with them. It's kind of a dangerous place, but I feel ok about it because I don't think I actively go around looking for fights.
Lots of people coming from twitter thinking they'll be able to sling the same mud without consequence are going to get burned bad.
Can you imagine if someone like Trump joined up? It would be total warfare :)
Oh... I can't imagine.......