Revelation 13:16 And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads:
17 And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.
18 Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.
The important thing to note is thus far, the RFID implant is the only thing the could fulfill this prophecy, because it is a mark in the right hand or forhead, with which, no one may buy or sell. That is my main reason, but my second, is your reason, which you gave: The fact that many things could go wrong. I am quite concerned about the civil liberties implications, of this chip.