I've always wanted to call people who plank stupid, but I've never seen anyone do it in person nor do I know anyone moronic enough to do it. I've only seen pictures. Now that a person who participates in planking is in this thread:
You are a moron, go spend your life on something productive, or at least somewhat funny.
I would add more to this but everything I think about planking has already been said by others in this thread.