Call it a hunch, but I'm pretty sure many of the people who are reading this right now may want to pick up one of these shirts from Think Geek before a certain Big Honkin' event happens in a month.
(This makes me wonder: has anyone ever gotten a very large number of people dressed at Red Shirts together at a convention, and taken a picture of them, posed as if they've all been killed? Because that would be pretty funny.)