Youtube pranks aren't even actual fucking pranks. They are just awful acts to people. Real pranks are something all parties can laugh off after the fact. Like this one time, a group of us got together to prank a buddy we knew who was leaving for a new job in a new state. So before he left, we went into his office and put post-it notes on everything, labeling his entire office. The table had notes saying "Table" All his books were labeled, all of his pictures, the ceiling, literally everything.
No one got hurt, or offended, or traumatized. We all had a good laugh afterwords. The worst a prank should ever be is an inconvenience. Anything worse than that is just being a dick. There is a world of difference between someone drawing on your face because you fell asleep at a party, and outright child abuse. One can be fixed with a quick shower, while the other can be damaging for the rest of that person's life. Those parents are outright scum.