Originally Posted by Mahjik
Look at it another way, why would Apple block anything that wasn't a security concern? All that would do is alienate carriers from using their devices which they aren't going to do.
I don't want to start an argument but I can already think of a few things that Apple "blocks" that are not likely to be security issues/concerns. For example, iOS only supports MP4 video files and you can only transfer media onto iOS devices through iTunes.