I thought it didn't work either but it works extremely well on [some] 13-14 year olds.

The smokes are kept behind a counter here to prevent theft. I buy a pack from a 14ish year old supermarket employee/girl. She turned around to get it, gazed over the packaging looking for the one I ordered, then she looked away, her head sunk between the shoulders and she made a face as if she just saw someone eat a baby. Took her a good 4 seconds to get back her senses and face the wall of death for a second trial.