flatbusher,
Little Froggie: I maintain that regardless of what you saw, unless you know the person, his situation or how he would react, I question whether your desire to rebuke him is appropriate.
I think you could question whether actually rebuking him would have been appropriate or not, but how could you question Little Froggie’s desire to do so in the absence of action?
Now, you said what he was watching was obviously assur or something to that effect. Well, how would you know that unless you too were looking at it?
Have you ever been on an airplane?