Good idea. When challenged, he could've pointed out that modifications were not prohibited and that since he *did* wear it, they would have no grounds to give him a failing grade. Or he could've used those magic words: "On the advice of counsel..." - bet that would've given them pause.
My first inclination, though, would've been to wear it and the entire time, stay in "Ace Ventura" character. You know... the "talking out of my @ss" skit. Simple, crude, offensive humor. Oops... my troublemaking past is peeking out. ;-)