This article is frustrating, it doesn't really explain the implications. In what sense is this "illegal"? Could I be jailed or fined for doing this? I doubt it

This article is frustrating, it doesn't really explain the implications. In what sense is this "illegal"? Could I be jailed or fined for doing this? I doubt it's going to be enforceable, unless somehow the carriers care enough to keep a database of phone ids and actually go after people? If a friend unlocks a phone for me, or I buy an unlocked phone unknowingly, am I now implicated? It just seems to me that this is going to effect businesses that repair phones and phone companies with bring your own phone plans, not individuals, because people will go on modding regardless. Or is it somehow going to be "illegal" to the extent that roms will be modified and forum posts referring to "illegal" activities like unlocking the phone will be blocked?