Not non-standard, but pilots who request descent then, a minute later,when several aircraft below have been vectored out their way, say, "We'll call you leaving."
Big temptation to say, "Descent clearance cancelled , maintain FL360 to the hold." and put everyone back on own nav.
I will try harder, if you agree to go to counselling
There are more things in heaven and earth than are dreamed of in your philosophy