I happen to have one, but it's provided by my employer and I can't really mess with it. I wonder if anyone with one would be able to actually mess with theirs if they use it for actual security purposes.
That's the problem with security FOB's, and the main reason I can't divulge anything. Companies that use FOB as part of the business control tightly use and distribution. If you get terminated, the first thing they get from you is the FOB. They care less about other equipment.
In government the FBI is in charge of security clearances and go "HANDS" on with recover/seizure. Don't mess with the 3 letter alphabet agencies. My present boss told about a guy in a agency who got booted one day. Two agents. His two arms. Grab'ed and speed escorted out of sight. They do this in high visibility, to show everyone what happens to dodgy people.