Our river valley trails are clay so we take a lot of issue with people who can't ride them without tearing them up from skidding... there's nothing like doing trail repair to have some dip**** tear through it after a rainstorm.
We have trails that are graveled and fine for post rain rides but the nekkid trails need a little more respect.
If you have to skid down and entire descent you don't belong on that piece of trail.