SURPRISE PLUS TO LEAVING THE HITCH IN
I usually take my hitch off when not towing for long periods. Apart from shins and the fact that being rear ended with it on could do more hitch and frame damage than being hit with it off, there is less rust and it is easier to spot developing rust with the hitch off. HOWEVER, on one occasion having it on served me well. I have an extended hitch so I can drop my tailgate. I got boxed in tight in a parking spot and taking the hitch off gave me the extra room I needed to wiggle out. Maybe I will put an extended hitch on each end of the truck to keep from getting boxed in again (ironically on the "Boxing Day" holiday).