If I'm going to a ghetto place, say Walmart, I intentionally wear a fanny pack which just screams Glock and I carry myself much like a law enforcement officer would.
Examine everyone in the crowd with a serious and firm look. If you look like you know what you're doing, most skells would prefer not fvck with someone who looks liek they're itching to smash them to the ground and put them in cuffs.
If you walk around like a relaxed goofball, they're gonna think you're prey. If you carry yourself like a serious man there to buy your shit and leave, they'll usually impose their rude walking in another direction. You know the type of guy in the crowd who you just would rather not bump into - look and act like him, lax. Don't look like prey, they don't feast on you.