I'm not particularly insecure personally, but I think this shirt is funny because it's not really the Opposite of a Security shirt, but its also close enough to make people stop and think about it for a minute, ya know?

The top right corner says WeMailCoconuts Event Services with a muscle arm.  I think its cute.

 For $30 plus whatever shipping costs says,  FREE SHIPPING, I'll mail you one. This is a Print on Demand product