thats funny....
Ii was a lifegaurd for 2 summers and the second year I worked the country club used a special dye that would turn purple in the water when someone would pee in it. THere was no getting away with that then
It would be funny to see it happen. In the first week we had it put in it seemd every day it would happen and their shorts or suit would get stained. it was pretty funny too.