I suppose what actually gets me is when they're looking at the next person (or the ceiling!) while apparently speaking to me. I just find that a bit rude, but didn't think i was that ugly.
And if they spoke to their friends they way to speak with their little pitches "hello, how are you today", they'd think they were weird! One biddie at my local co-op is horrendous for it and just sounds like a robot. It gets to the point where I could just stop her after scanning the last item and just say "No. No. No and I don't want one thank you" but that would be rude on my part.
Petty as hell... but that's the thread name!