DH and I took a flight recently and a fellow across aisle was watching R rated movies. He had the earpiece in and the closed captioning on (?) and the little girl in front of us who was unaccompanied was watching the movie. The man noticed but didn't seem to care! I was appalled that someone could be so irresponsible in front of a child!
I also disagree - it's should be the parents responsibility to watch the child.
I try not to take mine unless I have work to do, that I couldn't finish in the office. I do lots of presentations to clients. I also write reviews for my staff since flying durring business hours is the only time I get to do this.

I can't believe you said that!
The best kind is the rated X! JK!
Oooopsss...I didn't say that, did I?!?! Shame on me!! ::spank::
If you are in an office setting, you can't have just whatever you darn well please in your cube; you have a modicum of decorum to follow that is not impactive of those around you.
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And my kids use it to get homework assignments from classmates if we've taken them out of school for the trip. We also have used it to look up Disney or other info that we might want while on our trip, that we didn't research beforehand.