We had something like the first one when I was in high school. When I was a freshmen, I saw another student drop his pants, hop up on top of it, lower into the spout so it went ALL the way up his ass, reached around and turned the water on for a second, then lifted off and shot a wave of shit-water all over the basin/wall behind it, then hopped down and ran off giggling.
Yeah...
Haven't used a water fountain since.