A friend just told me today that he got his iphone stolen by a class mate. He went to the police, gave them the UID of the phone, and he got it back 3 days later.
Apperantly, as he told me, the police contacted apple which gave them the exact position of the mobile phone through the build in gps device, so the police could just pick it up.
To each story there are both sites of the story. No point was being written outlining the reasons why his accounts was being closed.
If he would be serious about doing business, he could have provided all that information in the beginning.
If everybody ends up using these devices (and creating black holes for the signal), the gsm providers have to increase the output power on their antennas in order to get the same coverage as before.