Funny. But trailer hitches are a major pet peeve of mine, I cannot stand people (mostly those who never actually use them) who leave them in, when not in use. It makes an excellent shin banger when you're walking around or between vehicles, and most of them just rust anyway, except the pretty aluminum ones people use for "show".
I use a hitch more than most I know, I own four trailers. But I remove the hitch and throw it under my back set every time I'm done with it, to save others the pain of walking into the thing, or the potential damage it could cause to another vehicle if the don't see it while parking behind me. I carry a few hitches with different drops and different ball sizes, and it's unlikely the next trailer I pull will require the same ball and drop as the one I just finished towing, anyway.
It seems to me that 99.9% of the people who drive around with a hitch on their truck all the time have it there for show, as most look unused. These are the same idiots buying truck nuts, or hanging a pair of clevises off their safety chain eyes.