Laws. You may not like it but what if the accused is innocent.

Because of sick fucks who target minors

Potential harassment

Because even though they kill, maim, etc.....they're still children.
(that's sarcasm)...and G forbid anyone criticizes the parents...
"I had no idea Billy was amassing a armory in the basement"....

If you have to ask the question I doubt you'll understand the answer ...

For safety I’m guessing.

Your answer was within the question! Well played.