You've seen/heard about the What Would Jesus Do thing, yes? This is that but with references to the Harry Potter as a Rationalist fanfic Yudkowsky is doing.
What Would Harry James Potter-Evans-Verres Do
What Would Professor Quirrel Do
Professor Quirrel Would Avada Kevadra (the Killing Curse, very efficient for removal of obstacles :P)
What are your best short witticisms, suitable for use on a t-shirt, bumper sticker, or similar location? Ideally something that might make someone reading it think, or get curious enough to ask about it. Simple in-group identification is fine too, though.
For context, therufs is spending today at the NC Maker Faire making t-shirts, and asked me for suggestions this morning. As I was still mostly asleep, I wasn't very helpful.