Yanbu! I have done this, and will continue to do it until the dirty little sods stop pissing everywhere
It's a willy, not a hosepipe, and if they can't aim they should sit down
One friend in particular pisses on the floor! On the wall! On the seat! It's beyond grim and I'm not here to clear it up
I get DH to clean it most of the time and have no qualms about calling any male in the house out for such behaviour