Visual Aid?

My teacher (when she was shattering my dreams of a less painful lesson plan) suggested that I discuss this movie with the class next week. I really want to bring in this advertisement for the film about Robert Kennedy, but is that really appropriate? I mean, it's not in English, so that's not related to class. And while it is funny, can I really get away with explaining this very immature typo in a classroom setting?

Sadly, I don't think I should be molding the young minds of the future with this sort of thing (it is with deep regret that I condemn the advertisement to house arrest).