Its probably a series of e-fuses, similar to what the xbox 360 uses. When it fails it blows 1. Then blows another one when its correct again mitigating the effect of the first one. On and on it goes. This is almost fool proof, but is beatable as is proven with modded 360's. However, the technique was easy on a large device, on a highly integrated device such as a phone its likely to be very difficult, and not worth it. Frankly I dont know why Motorola cares, and it does seem to be only to make sure you keep their stuff on there for whatever reason.. probably agreements with facebook and what not, that will pay Motorola money to make sure every Droid X has their stuff on it by default. or their are simply being assholes.