I watched a video from a Nigerian Comedian called Mark Angel. The video showed how some people abuse complementary items. a sales girl told a customer that whatsoever she buys from the shop she will qualify for a free tea. Guess what happened next? The little girl left and came back the next day with all her friends. Of cause, your guess is as good as mine.
The same happened at London Heathrow Airport First class passengers Lounge. A user of FlyerTalk narrated how he caught two passengers stuffing over 20 cans of unidentified beer and Crisps chips in their bag at the London Airport first class lounge.
Discus said: Visited F-lounge at LHR T5 Friday afternoon. We noticed two persons grabbing a lot of beer and putting it in their bags. They had some round trips to the bar and even stopped to get more when leaving (all within 3-4 minutes) They noticed me filming, but looked like they couldn’t care less. Guess they nicked 20+ cans and 5 bags of crisps.
Showed the video to the lounge manager immediately, and he was speechless and he (and some more staff?) left the lounge to go looking for them. Don’t know the result.
Based on the behaviour of these men, I guess it is not the first time. So look around. Managers office is by the entrance to the F-lounge. The staff at the front desk or in the cloakroom will probably be the best to notice and act fast.