Ours did also. The gates replace the human 'Greeters' who were formally employed to stand by the doors. If you go out the entry gate without going through a check out line, the gates honk at you. How do I know this, you ask?
Next, Walmart will have robots returning shopping carts from the parking lot. I bet 'ol Sam Walton would be turning in his grave if he knew what a retail monster his heirs have created.