Science fiction blog io9 is tackling the tough issues of our day, literally researching two websites to find out whether you can urinate in a pool without consequence:
Most of us have heard, at some point during our childhood, that before we go in the pool there was something we should know. Everyone knew that sometimes people peed in a pool. Knowing that young children often took advantage of this — pool managers put a chemical in pool water that reacted to urine. If someone peed in a pool, they'd be surrounded by a cloud of colored water and publicly shamed. It's such a common belief that some pools put up signs saying that they treated their pool with such chemicals, and it was featured in a movie, Grown Ups, in which four adult men were found out in such a manner.