I give the 13 yr old a time limit on showers. She often forgets, so I go shut off the water to the house. 1st time she came out screeching with shampoo in her hair. I told her TS and a lecture on time management. Now when I turn the water off she just deals with it. She still hasn't figured out how I get the water to shut off. I figure one day I'll be in a bad enough mood to just go shut off the hot water supply.
I'm also about a month away from replacing the light switches with timers. That one applies to my wife as well.
too funny, you are still young enough to have fight left in you, I just go out and piddle, by 17 they know way more than you, and you can't even imagine the drama. Then I have two little angles who haven't sprouted there horns yet, thank God.