As you know TSA is has so called security measure which they follow themselves. Their rules are just a pain for common traveler.
Wait a second. Not for just common people but for Martin Broughton too, the chairman of the UK carrier, recently expressed his views at the UK Airport Operators Association in London:
US security dictates what the rest of the world should do, but quite often they don't even follow the rules themselves America does not do internally a lot of the things they demand that we do, and that actually, the rules are "completely redundant."
Take the iPad, they still haven't decided if it is a laptop or it isn't a laptop. So some airports think you should take it out and some think you shouldn't