Actually there's huge chunks of the world where it's perfectly normal to squat when moving one's bowels. It's a bit more natural and your colon supposedly is less kinked up when you squat, thus making moving bowels "easier" for many. This is crazy to us with our fancy internets and what nots, but there's also chunks of the world where running water is a cherished privilege. So I mean if you're in an area where not EVERYONE is used to owning a toilet... a sign like this isn't as crazy.
Wait a minute... did I really just EXPLAIN a "dont squat on the toilet seat sign"?? LOL... ::hits the vape::