Who IS this guy?

This sign was briefly stationed at the corner of 9th St and Circle Blvd near Rite-Aid. Apparently this person occasionally takes his Sharpie to walls as well, usually with commentary about Christmas and Catholic paganism.

Is it a joke? A wee touch of mental illness? A serious plea to Corvallis denizens about the perils we face? I hope I see the author posting one of these signs some morning. It's deliciously weird.