I never had a problem with kids using the mic, the problem is most of them are just stupid or annoying. Usually they just scream and cry into the microphone. Or they try to fit in by being crude. I once got on a server that had a kid who literally said this to everyone.
"Hey slut, Why'd you die you slut? YOU'RE A SLUT!"(pardon the french)
"Hey slut, Why'd you die you slut? YOU'RE A SLUT!"(pardon the french)