Do they cut hose end off at dump station on purpose?

Thoughtless & lazy people are to blame. The park puts a hose with a threaded end on because that is the way a hose is. It is also the way people with rinse systems need a hose to make the system work.

The lazy sod who does not have a rinse system, nor does he have an old hose with an end cut off, destroys a good hose for his convenience leaving it useless for all after him.

It is not like hose sprayers cost that much. Buy one & keep it in the service bay to use for hose rinsing.