I don't know who did it, I think it was Blockgirl/Pablo
Can't point fingers at anyone until there's proof, if you had 0 interactions with them they most likely didn't do it, although if you haven't talked to anyone it's going to make it 10x worse to figure it out.
Have you hosted a server recently? Has anyone connected to your server? Has anyone tried to talk to you?
Although they were probably browsing the forums and saw how you act. If you hosted a server that's how they got your IP if you're wondering.
"People were mean to me on an animated Lego game so I decided to swat their house"
You're missing the point.