I understand. At my Walmart it’s quite lax nobody really checks anything. They just waive everybody through to the exit like they couldn’t be bothered with security.
Even though it’s one big chain every store is different. For example, there is one store nearby that has virtually everything locked up in pharmacy including three dollar bottles of aspirin. Another store five miles away does not lock up anything less than $50 in pharmacy.
If you feel there is discrimination going on you can call corporate in Bentonville describe to them what you saw. Show you care about the problem. Dont bother with store management not helpful. I had to call Bentonville on another manner and got results and a $25 gift coupon for my trouble.