Look at his posts and it says "Banned!" next to it.
Looking at some of his other posts he seemed to be asking a lot of Qs on various sensitive matters. The latter was something about nuclear weapons. There are very clever people out there that tread the world of cyberspace who often aren't who they appear to be.
Luckily for me, my blithering gives me away as a Crab every time!
LJ