You've probably heard this saying before: if it's yellow, let it mellow; if it's brown, let it drown. It's a saying that started in 60s, a product of the hippies and that mind set. It basically is encouraging the conservation of water and discouraging wasting water as much as possible. But I feel that this doesn't set really set too well for many people.
Many people would find this disgusting. This motto was something I followed quite closely in my freshman year of college. I went to what some people would call a "hippie" college and signs with this motto could be found in many restrooms. I followed this until I heard of something called "backsplash." It's reminds me of backwash - the spit that is found in your drinks from getting your spit mixed in with your beverage while drinking. But backsplash sounds so much grosser - it's the pee splashing back onto your bottom. And not only is it pee...but it's someone else's pee if you are following this lovely motto. Ew, right?
So this conservation motto is really just a personal choice. For me, I will not flush if I am using a public restroom or in my own home. But for me the thing is, I don't really care if my own pee is "backsplashing." And in a public restroom, chances are the next person is going to flush the toilet and if they don't, well, that's their own personal choice.