I have a disgusting habit I attribute to growing up in the middle of a drought. I have a hard time remembering to flush. I think it's wrong to flush our waste with water fit to drink. You'd think by now more companies would be finding a way to use grey water to flush toilets but I could only find one- in the UK.
I'm sure some resourceful Californian will design as simple system for flushing as they are now officially in a worse drought than the nineties, thanks to the shad. Californians can no longer pump water from the deltas.
Growing up in a drought gave me some good habits as well. I can shower using less than a minute's worth of water and I always wash my car on the grass (that is if it gets washed...I figure never washing it is REALLY good for the environment). So be prepared if a large number of the toilets in this world go unflushed because we're going to have an entire state living by the mantra: "If it's yellow let it mellow if it's brown flush it down."