Katilian on 22 July 2007
Hint for the Internet: Ignore anything personal.
Seriously, youtube comments generally are so pathetic anyway I don't know why anyone would take them seriously. As long as you've been smart and haven't put any personal details up you should be fine. Given you are 15, I'll assume you are part of the myspace crowd (or at least one of those social networking sites). Be very careful what you put up there too. While I doubt it is common, there have been people that have had various issues with Work/School due to stuff placed on myspace/facebook/etc...
Simply, treat the internet as if everyone on it is a stranger.
