Is there bad grammar in Cinemark's "No Texting" warning?

Question

The sentence in question is "Do not be the person we ask to leave the auditorium, because we **will**." It sounds very wrong to me, but I can't put my finger on the exact problem. Nobody on the Internet has jumped on this, so I'm wondering whether I'm right about it being wrong. The sentence comes from an announcement which is shown before every movie at Cinemark theaters (at least the ones where I live). It's also on YouTube: <http://www.youtube.com/watch?v=kgU2ue37hgY>. The objectionable sentence is at 0:26. My best description of the problem is that one of the two ideas that "because" is linking is missing. The speaker means "Do not be the person we ask to leave the auditorium, (and don't think we won't) because we **will**.".

Answer 1

"...because we will..." is an elliptical dependent/subordinate clause. The part that is left out is "ask you to leave". The entire sentence, then, is "Do not be the person we ask to leave the auditorium, because we will ask you to leave."