Lol that trick usually come out when mothers, sexual orientation and race start getting thrown about as insults, trolls thrive on the fact they think their anonymous on the internet. I don't just launch into people randomly btw, you do have to persistently annoy me (dodge bans, follow me, etc).
It's a prank not a campaign of hate, it makes them paranoid, which makes them say stupid things and leaves a lot of egg on face when they fall for it.