I don't know why little children would be posting on YouTube in the first place.
In any case, I'd hope said children would have better manners than Supermartyoh's examples.
JEDIT: And just so we're all clear, I don't really advocate lobotomizing individuals, not even obnoxious Internet morons. Putting them over the knee and beating their rears raw with a wooden paddle is much more constructive*.
*The Internet morons, that is, not children or mentally disabled individuals.