So i went to get my usual cup of joe and ended up waiting behind a guy who appeared to be trying to buy cigarettes. The cashier asked for his ID and I hear him mutter, "This is bullshit" and then in a clear and distinct voice tell her "I kill people for a living." She tells him she needs to see his ID and he hands her his marine id card and during the split second when both are holding the card during the change he's staring at her and says to her again "I kill people for a living." She tells him that's nice and that he looks young and he says "I kill people for a living and I look young?" She hands him the cigarettes, rings him up, and tells him to have a nice day and he walks out. When he turned around, he looked like he was 15, maybe 16. I ask the cashier how old he was and apparently he turned 18 in March. I advised her the next time something like that happens to get his name, id number, and rank and then contact the local recruitment area. Not sure if that will get anything done, but i figure it would be a start. How would you handle that situation?