"Next Person In Line"

If I was running a campaign to become the next manager of Target (or CVS or a grocery store), my campaign would be centered around stopping jerks at the end of lines who think a cashier who just opened up his/her register is talking to them when he/she says, "I can help the next person in line." Every time a new light comes on, the cashier specifically says he/she can help the next person in line - not the person at the end of the line, nor the person who just walked over conveniently at the time the new register opened. The cashier might as well just say "Hi, I can help the closest a-hole."