I'm going to call out a person vaping in the movie theater.
Is it bothering you that he is inside?
He disrespected my friend by looking at him funny because he was vaping in there.
It's rude and inappropriate to vape in an enclosed public area such as a movie theater and you are right to call that behavior out if you see it. However, it might be more appropriate to tell someone in a position of authority such as an usher about the behavior so that the person can better address the situation if need be.
I'll comment on it by saying that's a stupid vape, why can't you smoke outside?
I agree with you! I think that it is rude to vape in an enclosed space like the theater.