That's it, another movement, luckily a number 1

Whoever is peeing all over my new toilets seats had better STOP! This is the 3rd time. We put THREE new rolls of toilet paper (the soft, quality stuff and all), they are now gone. No idea where to. Anyway this extreme graffiti style peeing has to stop. If I catch you, you won't be peeing anyway, anytime soon...WHACK.