Am cross-posting from my LJ at Snowystingray's suggestion. Hope these give you a few laughs.
Thanks to a tip from Aceofhadeon, I have spent a very enjoyable afternoon playing with Demotivator posters, and am including the results below. The text is blurry in the pix below - click on them to see properly sized versions. Screencaps courtesy of RichardArmitageOnline and RichardArmitageNet.