I know it sounds like a /r/thathappened but it was one of those situations where it built up over several trips to the store of this guy harrassing me to the point where I didn't want to shop at Walmart anymore. I am averse to confrontation so when he took over my self-checkout to sign up for the credit card I was like, dude fuck off, go away. And he was a bit shocked and acted like I was being dramatic but it was because I hadn't been more politely forceful in our earlier trips.