Very funny.
Okay, so I found out a new thing that invites unwanted attention: idleness. Today a guy came through my line with a couple of kids, and one of the kids was staring at me so, figuring he just wanted attention, I ignored him (and it worked pretty well; in my peripheral vision I could see him looking around elsewhere). I kept ignoring him until they left... and apparently the dad noticed because he decided to bend over the register and get all in my face so I'd give him attention too. I'd already bagged his stuff, he could have just walked away, but no, he had to make sure I was on earth first.
It couldn't have been a class thing; the guy was using WIC checks. He was just being pathetic. I see where his kids get it from.
I guess next time I bag a slow order like that (WIC checks take forever, hence my idleness), I'll just walk away as soon as I'm done, even if there are other people in line (and I might walk away to where I can observe from a distance, then come back once there's more work).