Well not only that, but if he is the guy in the photo he is also taking up at least one handicap accessible spot. I'd shrug, say "Have it your way" and go take a photo from the other side complete with license plate. Then I'd wait. I mean if he ends up indeed not impacting anyone then I don't really care. If he does end up impacting someone then I'd believe something should be done. If he harms no one then reporting it before there is a victim is jumping the gun as far as I am concerned. I am a firm believer in "No victim, no crime".