You must be the most uninventive fuck I've ever encountered.
Most likely its a sensortmatic pin. What you want to do is get a match or a dremel and either grind or burn off the bulge on the larger/longer piece of the tag. Inside is a clamp like piece of metal which puts pressure on the pin from the smaller piece. Either muscle it out of alignment, or use two pairs of pliers to bend the large piece into an arch, which will release the tension on the small metal clamps, allowing you to release the pin, and remove the tag.
Use your goddamn brain for thirty fucking seconds before you post a thread.