I think we were trained for this game while still in the org. We were always on the look out for other witnesses where ever we went.
On a ski trip back in the early/mid 80's there was a group in the same warming hut as we were. (About 8 or 10 us and about 4 or 6 of them.) Finally my roommate got up the nerve to ask - but she didn't want to ask straight out if they were Jehovah's witnesses. Just in case they weren't, she didn't want to pegged as one herself, I guess. So, instead, she asked one of the guys if he knew 'Fred Franz'.
He quickly responded: "No. uh uh. Not me," very abruptly and he quickly turned away.
The guy paused a minute, and then said: "Wait, did you say 'Fred' Franz?" "Yes." "OH!! I thought you were talking about 'Ray Franz'...!"
They had a good laugh but someone had to explain it to me at the time.
Yup. Even in ski gear, you can spot 'em.