Wal-mart is almost exclusively self-checkout now. The last time I was there, the lady checking receipts at the exit was a little aggressive... and slow.
I chose to not participate in this nonsense, so I just skipped the exit line and left. I heard her yelling "sir... SIR!!!" As I kept walking, I raised my receipt over my head and kept walking, leaving the store.
Look. You can either trust me to do self-checkout, or you can put your cashiers back in place like it used to be. I'm not interested in proving that I did your job anymore.
~ Ziggy