Who would you report it to? One of their employees was out on a forklift trying to maneuver around it... obviously they don't care.
A lot of people with big vehicles, especially hauling trailers feel that they are entitled to park wherever they feel like, because they won't fit in a parking space. I'm just the opposite, preferring to park on the back side of the parking lot and leave the closer spots for people who can't get around as well. It also is a lot easier to get out afterwards, plus because they are the farthest from the door I am always parked in the same spot and don't have to remember where the truck is.