Dinner at my parents house tonight. I started washing up afterwards. Got told off, again, for filling the tiny washing up bowl up from the hot tap. Apparently I should boil the kettle and pour it into the bowl. It's an ongoing dispute.
There were vast amounts of things to be washed, some quite greasy, and large. So I had run a sink full of hot water and started on the cleaner things
I think it really doesn't cost that much to run the tap. Their main argument against it is wasting the cold water that runs away before the warm cones through.
My arguementis do what you like but when I'm washing up dishes, pots etc for 6 people, 2 separate meals, then I'll need a decent sink of hot water.