There's something on the internet that you desperately want to keep everyone from seeing. Something you're deeply embarrassed of. That would show all your friends how you're not actually as smart and fashionable and ironically self-aware as you pretend to be. And you really ought to get over it.
We all have stuff like this. Maybe it's a gross Facebook album from college. Or a Xanga or Livejournal or Blogger account, or a dance you did, or an a cappella YouTube video. Or, god forbid, your dating profile. (Thanks again for that, Sam. Dick.)