You can buy books that teach you how to do fun things with RFID chips, like turning on specific hardware in your home or replacing the lock on a door with an electronic one that responds only to the chip. The only difference with the verichip is that it goes under your skin and that it contains other information about you that the state and credit companies already have anyways. A chip in your arm, by the way, wont do anything to your brain. It's not mind control.