CaptainCoxwaggle said:
Gee whiz, it's just a harmless prank.
I would have done the same to my own friends at that age. Actually this incident reminds me of a time when I found one of my friends passed out drunk, I knew he was a homophobe (a real one that is, one who is actually scared of homosexuals), so I microwaved some mayonnaise and flicked some on his face, then woke him up with my pants off.
He locked himself in the shower for three hours.
The difference is, warm mayonnaise isn't particularly unsanitary. Body fluids usually are. The two doesn't compare. Second, your friend was older and someone who knew you. Your prank does not compare to luring someone over (particularly if that person is very trustful due to a condition) and dumping a bucket of piss on their head. Which can lead to health complications on top of being appaling. You pranked someone you knew in a way that didn't endanger him.
It's neither harmless nor a good prank. It's abusing someone's trust in a way they can't defend themselves against, simply for cheap giggles at someone else's humiliation. It's one thing between mates who can prank you back, but to do something on this scale to someone who isn't involved is unexcusable and simply not a good prank.
Yes, children usually haven't developed foresight and responsibility, but a teenager could and damn well should be expected to know that dumping piss on someone is far too much. They should be expected to know that they shouldn't exploit someone's misplaced trust in them for giggles in such a cheap, humiliating way.
While a witch hunt would indeed be too much, getting them charged in court after this is the only right thing to do. They had a choice, after all. It doesn't matter if you're a young lad in a group, you always have a choice.
I dread to think what those wankers might do if they aren't introduced to the idea of consequence after this. It's the best cure for this particular kind of "prankster".