Voted : I use one of those toilet seat covers if I have to sit, I use toilet seat protectors.
I put one in one direction, add another at 180 degrees to that. Then if it's really dirty, I repeat it twice in other directions using the inside paper thingy to interlock them so that it wouldn't move.
people are pigs. I have experienced some toilets that looks like the "worst toilet in scotland" in the movie Trainspotting.