don't stand so close to me

Recently I'm eating lunch at Taco Bell aka Toxic Belch aka I-Wanna-Get-Explosive-Diarrhea-Immediately. I am attempting to pay the dim-witted girl who has just half-heartedly taken my order when 2 teenage boys saunter/slouch into the place. One of whom proceeds to approach the counter and stands SHOULDER TO SHOULDER with me. First of all, a lot of times I don't want my own family to touch me. Second, why is this AXE-saturated degenerate feeling comfortable/confident enough to saunter over to a 35 year old stay at home mom and rub elbows with her? I immediately poke my unexfoliated elbows in his direction and make unfriendly old person noises. This doesn't make a dent and I am forced to verbalize my displeasure, "Hey, Kid! Watch where you're standing!" I've never sounded so old.