I guess the only thing to do is to have cameras in the john. It seems like a gross invasion of privacy but I'd rather have someone watch me tinkle than blow my family to smithereens.
The interesting thing is that the ME men took uncased cameras into the johns with them! What was the point? IF they weren't terrorists, were they pornographers?
And what was the full bag of McDonald's that came out of the john empty? Plastique? Or, a rotten hamberger that got flushed?