man has messed up the earth so much that more use of water/ or trying to stop the use of water is not going to make any significant difference, and i cannot see it ever being banned, you could say the same thing for - littering for wasting food, for starving children in other countries, for wars, for violence, etc etc - none of these things are going to be stopped or prevented by man, as there is either too many people doing it allready, or the governments care more about money than stopping any of these things.
Banning pure water / use of lots of water is not going to work, there are simply too many millions of houses /properties everywhere for the government to prevent this, as everyone needs water.
Also not doing anything about it is not going to do any good either, there will probably be droughts and water shortages eventually and the government will probably just up the prices, which doesnt help anyone.
Again its just another thing which is not going to change, and if there are problems caused by it then too bad, too bad for everyone including me. The world is messed up allready.
Water doesnt ever get destroyed anyway, it allways cycles, so theres allways going to be enough water.