Here's the explanation, paraphrased from something Ghost posted long ago in the thread about Tyche's banning:
"[Shangdi] didnt really seem to have interest in interfacing with anyone constructively on the forum. He mostly just haunted political threads to ruffle feathers using superskeeeery alt-rightisms to watch people's reactions. Not surprised to see this, but ultimately I question why he wasted his time to begin with."
If you want to go on about the pros and cons of a lawsuit, by all means. If you want to win an argument, by all means, within reason. But condescension and the worst kind of mansplaining is shit I'm not going to tolerate in the Politics forum.
We all saw what happened with the Tyche matter and, frankly, I wasn't going to allow that shit happen again.
Also, if you invite me to ban you, I will take that invitation.