The recent furore of of its banning of Oscar Wildes "The Importance of Being Earnest" (graphic version app) suggests that it's not a good idea. (OK the ban was later reversed but Apple shouldn't get involved anyway. See article on TechCrunch here.) Apple is in the hardware and software business, that's it. It's illogical to censor content; after all Macs can access all the content you want so why restrict access on iPads or iPhones? If you're 18 or over, it should be your choice, your freedom of choice, not restricted by Apple's censors. And the argument that if an app such as "How to build a nuclear bomb" should be allowed in the Store, think about it - that information is freely available on the Internet anyway. Apple, it's a minefield and it's none of your business.