Oh man, I love this theory. I am starting my list right now!
Just as people know since 9/11 that you can’t joke about bombs, common sense says you don’t carry something, particuarly on your chest, that resembles a bomb. Especially in a town that went through the comedy central promotion 8 months before.
Bottomline: you absolve her, I don’t. This incident happened the day after she had a practical reason to have that thing on. She woke up and decided to put it on again.