Is it okay if I want to punch the Walmart lady?
Why do you want to punch the lady? Is this for real? Oh stop it.
She's a lazy lady working there and she should work harder.
It is okay to feel frustrated about having to deal with issues and having people not want to help you but violence is not the answer. You will be kicked out and banned if not jailed for punching her.
I'm not going to get kicked out and it's not like I'm going to hurt her.
Yes it will hurt her, and you know it. This is not acceptable. Be sure that you can own up to the consequences afterwards which might include police arrest.