On American Inventor they had this guy who made an invention to cover the toilet when you fluch it, a filter kind of thing. Apparently when you flush lots of lots of germs and other stuff get shot into the air (he showed it with an infra-red camera). Man, was it gross. My question is, though, why not just close the seat, and you won't need that invention.
I was always pretty good at putting the seat down, but after seeing that show, and what gets thrown into the air all around me when I flush, I am now president of the seat-down-club.