As a former employee in a nationwide chain of pubs I had to complete a training course about the laws and practices of alcohol sales, even though I was a kitchen porter and had no contact with the customers.
At one point, they got about ten head-and-shoulders shots of would-be customers and asked us to gauge whether they were legal or underage. Operating on common sense, everyone doing the exercise got over half of their answers wrong, and the take-home message was that you should never trust your instincts and always ask for ID, even if they've got World War II medals, because appearances can be very deceiving.

It definitely wasn't because the author(s) of the course materials had deliberately mixed up and/or fabricated the descriptions that went with the photos, oh no.
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Tue 4 Oct 2011, 23:23, Reply)