I searched youtube for pencillmadness and came across two videos from a guy who takes credit for drawings from a whole bunch of users.
these are the links
http://www.youtube.com/user/ArtsKinG1#p/u/19/P5mmLkzZ5hM
http://www.youtube.com/user/ArtsKinG1#p/u/15/PZphseVbeno

If you watch it you'll see that he is a fraud.

At the bottom of his page you can leave a comment, please do let him know what your opinion is in this matter.