Originally Posted by scirel
Maybe I'm an optimist, but I think they'd just scowl at you and let you through. They're busy, and though you might be perceived as rude, you wouldn't necessarily be perceived as a security risk.
You might even get a laugh out of someone with a good sense of humor!
At my airport, this would exactly be the case. It might raise some eyebrows, but we don't care what your shirt says. We've seen far worse already. Just place your items in the tray and walk through. Have a good flight!
Myself, I would chuckle.