Hmm....
Posting with tripcodes would definitely piss some of them off. Us circlejerking with our trips would piss them off, too. As long as we keep derailing/shitposting in good threads and posting shitty threads, we'll bring anger to them with every post we make.
You can make a new thread every 5 minutes or so on the imageboards. We could flood it with our own invented memes and see how long it takes until they accept them as board culture. We could also shit up the ghost board at
http://fuuka.warosu.org/ to the point where it's unbearably bad. I think that's offend quite a few of the aspies.