Have you ever looked at the Internet's seedy underbelly?
I'm not talking about the scammers, the porn peddlers, the file sharers, email spammers and political party operatives. They're just part of the landscape, we see them all the time, most of us know how to handle them.
No, this time I'm talking about the sheer volume of completely, utterly useless robot-generated crap that sits around, doing nothing at all except to make it harder to find what you're looking for.