I waited until he got out and I asked him "No mask?" to which he replied "Why?" and I said "The sign says No Mask, No Service" (and everybody else was wearing one) and this asshole replies "I wasn't buying anything." I laughed at him and drove off.
And you're so proud of that interaction that you are posting it in a comment on HN right now?
For all you know the officer was called into the store for an urgent matter.
Be kind to others, and you'll lead a much happier and fulfilling life.