How can we get any work done on this ship with someone on the crew looking like that!
This sign is an 'up punch' toward the self superior people who wear sunglasses indoors. In doing this, it is using those people's sense of self superiority to frame them as inferior. JOKE EXPLAINED.
Maybe have some self-restraint and don't buy them for your kids when they ask, huh?
If you don’t want to get fired for your looks, go work at KFC where everyone is ugly, THAT’LL even the playing field for ya.