Twitter's new Vine service lets people post six-second-long videos to the Internet, so people are obviously using it for porn. Apple goes out of its way to make it look like they keep porn off their devices, so they boot apps from the App Store pretty quickly if people start using them for porn. To avoid getting booted altogether, Vine has preemptively changed their rating to 17+, and made a few other adjustments in their new update.
After being removed from the iOS App Store last week for problems with users submitting pornographic images, photo sharing app 500px has made some adjustments and is back in the game. The biggest change is that the app now features a way for users to report images that violate Apple's draconian terms. It's stupid for Apple to go to such great lengths to kill apps that people are using to share naked picture when Safari is still the best porn app for iOS.
This took... actually a little bit more time than we would have expected, but it looks like users have already started using Twitter's new Vine app to post sexually explicit material. Vine is a service that lets people post six-second videos to Twitter, and it seems that a lot of people have been using it to post six seconds of porn, once again proving that if you give people a new way to communicate, they will almost immediately use it to send each other pictures of their genitals.