I have been shopping at Sam Walton's stores since Sam was waiting on customers himself.Another one to add to my "Why I don't shop at WalMart" crimes!
I have never seen anyone mugged, robbed, beat on, molested, raped or even purse snatched.
Yes, I stay aware of my surrounding. Yes, I will act if I need to, thank God I have never needed to.
I have seen several shoplifting incidents, but at major "upscale" department and specialty stores, not at Walmart.
It's OK to shop there. Your risks are no greater there than anywhere else.