well, I have registered mine as "stolen" with apple, reported to the police
I understand, if anyone uses a specific serial no. device, Apple should be able to track it - provided they want to
I believe they do not do so, under some privacy guidelines - but they should be able to do so if the police followed-up on the stolen devices
Apple could also add this as an additional feature in their devices - that the stolen devices cannot be misused.... it will certainly get them more customers!!
I am hoping that someone from Apple is listening!!