I'm going to be careful to scratch the cars as I park at Walmart.
What do you mean be careful? Careful is when you don't scratch anything.
I won't do it during the day when you could recognize my face. I'll do it at night when no one is watching.
You want to scratch other's cars in a parking lot, but that is very harmful to other's property. You can cause some major damage and make the cars' value go down if they were to sell them. Reshape your thought patterns to do something productive and less malicious to others.
Fuck, I'll do what I want.
It's wrong to purposely scratch cars. A lot of parking lots have cameras and are well lit, so you could get caught at night. You should probably rethink this plan.