The ability to deny service to a blacklisted device already is part of the GSM standard and the central registry needed to get this working:
Now it is only a matter of getting the carriers to actually use this list to deny service. In most SGSN, all it takes is changing a config flag.
Yes, that hard!
Recent research has tended to show that the Abominable No-Man is being replaced by the Prohibitive Procrastinator. -- C.N. Parkinson