Impersonating users deleted/perm-banned, including most notably "Leuders"

This individual has similar characteristics. Dennis Markuse, aka David Mabus. He reared his head on a forum known as Scepcop where he would post rambling incoherent nonsense attacking atheists. He was notorious for harassing well known personalities such as PZ Myers and Dawkins... . After many email complaints to the Montreal police he was arrested.