Sure, someone could try to go up there and carefully scrape all the snow off by hand, but that might be too slow and dangerous. This method is obviously more effective, much faster, and it gets points for spectacle.
It's situations like these where we could ask questions all day about who the worse actor is. But maybe it's more apt to consider the fact that if you do something that you're certain will make someone extremely angry, all bets are off when you come back to your car. For another story of snowy entitlement, here's the one about entitled neighbors who didn't like the way a dad snow cleared their driveway and ended up getting fined .