Sewer hose length and support recommendation

The really pertinent questions is do you wear plastic gloves when hooking up and take down. Do you use your fresh water hose to flush the dump hose. Have you ever,ever dumped black water to the ground surface. Did you ever back flow black water into the grey water tank for that extra little bit of hold capacity. Have you forgotten to close the valves before putting the cap back on and dropped a couple gallons under the rv next time you dump. How do you wash your shoes after a dump.
The answers to the above can describe wither you are an occasional rver or full time traveler