I found this picture on Pharyngula and it's posted here as an Atheist PSA (Public Service Announcement). This is David Mabus, otherwise known as DM, whose real name is Dennis Markuze. Anyone who has been in the godless blogosphere has seen his spammy hate filled comments. I've only been doing Purgatory for less than a year and I have noticed DM's mental deterioration. At first the man's comments were just crazy/crass, but now they have morphed into threats of violence against Atheists. Most people who have mental illness are not a threat, however, I would consider DM to be a danger to himself and to others.
This picture was taken in Montreal (DM lives there) where he crashed an AAI convention did a rant and then fled. Luckily, his picture was taken.
Just to clarify, this isn't a comedy bit. This guy is potentially dagerous.