Patton Oswalt just wrote a blog post about how he was joke-thieved by a man named Nick Madson.
In the blog, he posts several videos of Madson's performance (in front of what sounds like a tiny ass crowd) that features literally word-for-word Patton Oswalt bits, including a couple that I know by heart. And hearing them bastardized by this asshole is disheartening.
Patton does note that this douche is clearly not going anywhere with his material (although, he did claim that he wrote comedy for the likes of Patton Oswalt, Louis CK, and Dave Attell, and thus owned their jokes.) Patton then vaguely references Ned Holness (better known as Carlos Mencia) as someone that steals jokes and then puts them on national television.