I think it's overkill on the censorship to have any app that connects to the internet to be 17+.
Look at it this way, you can get to so much adult material through safari anyway that placing all these restrictions on applications is pointless. Anyone under 17 that wants to find adult things will through safari.
But, then I realize someone made the point that you can block safari from being used on the iphone. Ok, but what parent is going to buy their child an expensive iphone when they aren't going to let them use safari on it? It makes the iphone lose one of its main features. A parent that was that strict with their child I'm sure would just buy them a lesser phone that couldn't access the internet.
Further, any child young enough to not be able to handle seeing some adult material shouldn't have an iphone in the first place. Parents should not be buying their 10 year olds iphones! Wait until they are teenagers and then maybe they can get one, and by that point, I think most reasonable people would agree a modern day teenager can handle seeing some 'adult' material.
HEY!
THAT LAST PARAGRAPH OFFENDED ME..
who said that 10-12 yr olds CAN'T HAVE iPhones?
People today are so over protective about this "adult" crap