Oh thank you all for this post!
DS is definately a destroyer! Water is probably the biggest temptation. We too have experienced the spray effect in the bathroom, kitchen, and laundry room. The latest stunt was to plug up the walk in shower drain so that the water couldn't drain out and instead flooded the bathroom floor. I really should have known there was a problem when he was taking a 20 minute shower...
My mother cannot understand at all but I gave up on the 1 toy out at a time rule. Now I have a plastic bin under an end table in the living room. Everything gets put in it at night. Once it is full, DS has to put it all away to start over again. That part still takes supervision or I find it emptied in a corner of his bedroom. Of course my mother just thinks I'm encouraging him to be a slob and irresponsible. However, with the 1 toy out rule, DS just stopped playing with his toys and all he wanted to do was screens.
Thanks for all the great stories.