"I asked whether Apple will enable unsigned applications like Android and Palm OS. Steve [Jobs]: There’s a porn store for Android… you can download it, your kids can download it. That’s a place we don’t want to go, so we’re not going to." (http://live.gdgt.com/2010/04/08/live-iphone-os-4-0-event-coverage/)
This is a very bad behavior, Steve. Very bad.