"He also forced everyone, small and great, rich and poor, free and slave, to receive a mark on his right hand or on his forehead so that no one could buy or sell unless he had the mark, which is the name of the beast or the number of his name. This calls for wisdom. If anyone has insight, let him calculate the number of the beast, for it is man's number. His number is 666" (Rev. 13:16-18).
It doesn't count unless they make you stick the ID on the back of your hand or forehead.
I think they're safe. Such devout people should know the passage a little better.