i haven't done it myself, but when i worked at [location edited] a couple of my friends worked there also. one day, a guy who had once stolen a bunch of stuff from one of them called and ordered a pizza. when ben (my friend) found out who the pizza was for, he went to the bathroom and took a piss, then scooped up a little of the toilet water with an empty olive can. he then poured it onto the pizza dough, put on the sauce and toppings, and sent it through the oven. i'm assuming the guy ate the pizza.