The ones who barrage you with stupid statements like Your Mom, Your dad, Your Sister, You. Attempting to how do you say..."Troll"
Most Helpful Girl
The sad part is that many of those '9 year olds' are probably grown men and women with nothing better to do with their lives.
I don't comment much on youtube (because I'm almost never signed in) so, I've never faced a 9 year old trolling on me. But I would probably ignore them or say something and never respond after that,0