Mellow Yellow! Not Bloody Likely!

I have been seeing these commercials on TV called"What's your water IQ by thinkwater.ca with this guy questioning people about water usage. One comment I find abhorent is If it's yellow let it mellow and if it's brown flush it down!!! Yuck! I understand that they are trying to create awarenss about our water usage and help the earth but I think there are greater ways to save our planet as opposed to letting yellow pee linger in our toilets to save on flushes. Imagine being a family of lets say, oh five! with mellowing urine hangin out all day.....not a pretty picture.