I am not a one to shy from criticizing LE. In this case, I can see little wrong though. I've pulled a boat quite a bit, and as the others have said, if it's working one time, it might not be the next. As far as I know, there is no "right" to drive. The states consider it a "privilege" and can pull your license for a number of reasons. They ain't tasering or beating you with a billy club, so call it good and move on, what I say anyway.