Kids these days
One of the supposed virtues of Android is that it's "open", it's easy to sideload apps without going through a curated "app store", so I can imagine a situation where a kid codes an app and distributes it to his friends, and before you know it, he can unlock the phone of any one in his school, and half the phones of anyone under 18 in his city by Friday.
Except that, apparently, kids today don't know how to program, and if they do, they're more likely to be hundreds of miles away from their friends, and can't get their hands on the phones anyway.