On Mon, 11 May 2009 07:00:26 -0700 (PDT), Frogwatch
wrote:

Once again, reason saves me from thinking too badly of my neighbors.
I realized that my trailer was the only one there. Thus, the incident
probably was NOT about skin color and was only about one person being
a jerk. Still a nasty thing to do.

It might not even be that.

It could have been kids playing around, or it could have vibrated
loose. I use a locking pin on my ball mount/receiver. Doing a
thorough check out of the trailer, hitch and lights before driving off
is an excellent idea.

I once had a hitch ball start to vibrate loose after a 300 mile run
even though it had a lock washer and had been well tightened with a
wrench. Weird things sometimes happen to heavily loaded components.