They can't. The money is in ads, and advertisers won't touch anything that isn't family-friendly. A startup might be able to do a decent job, but they would ge

They can't. The money is in ads, and advertisers won't touch anything that isn't family-friendly. A startup might be able to do a decent job, but they would get booted off the app store faster than you can say a four-letter word. Too bad there's no good way for users to write and run arbitrary code on their devices.