One of my favorite things to do when I saw someone having a spergout was reply to the conversation pretending to be them, typing an angry response in ALL CAPS, and then when I hit the letter 'v' in a word I copy/paste in some weird fetish porn link instead and continue typing the word without any space in between, as if it had just been a normal v there. The implication being that they accidentally held down ctrl along with shift and didn't notice that they ctrl-v'd some weird shit they had saved to their clipboard into the message. I'd usually just hit up rule34 and type in a couple of gross tags like fart and inflation and copy the link of the first result, but sometimes it's important to tailor it to the poster for believability, for example in a nintendo thread it's more plausible that some retard might be caught fapping to yoshi prolapse than random nigger OC prolapse.
If a namefag ever pissed me off, I'd go pick an /aco/ fetish thread at random, and leave a retarded or embarrassing comment in there with their name on, then delete it as soon as the site lets me and repost it anonymously, so it looks like they genuinely forgot to remove their name and tried to cover it up before anyone saw. I don't call it out immediately, I leave it in my back pocket for at least a week or so before digging out the archive link when they appear again shitting up another thread. "kek I found this searching your name in the archive, kind of ironic the guy saying others have 'shit taste' is a gay diaperfag isn't it"
You just can't do that on here. It's not the same.