Okay, so when I was young, like in the 1970s and 1980s, I was told in books (Hal Lindsey's books come to mind, but there were others) and occasionally in some church groups that the "Mark of the Beast" on the forehead and hand (Rev. 13:16-17; 14:9-10; 16:2; 19:20; 20:4) was some sort of tattoo. …