Actually, it's not terribly difficult to pull the Internet equivalent of escaping to a deserted island. All it takes is time and tenacity.
A good place to start is with a Google search of your name to see if anything unsavory pops up. Remember that Google isn’t your enemy; it's just the messenger. If you want to remove some embarrassing things you've said in a forum - or bad things that have been said about you somewhere - you need to get it removed from the original source.