I'd like to secretly video tape naughty things with my iPhone, stuff like people changing/sexing, my grandma's psycho rantings, titties, etc. I want the video app to run while the screen is off and I want the ability to lock the phone while it's recording so that if someone picks it up they won't know it's recording. Does such an app exist? If not, would Apple even approve an app like this? Apple showed off this ability on their 3GS commerical. False advertising?