rotblitz: it should be the opposite. since it fits the category, it should be blocked, and people who want exceptions could add it to never block.  thats what opendns is good for.

"The major differentiator that I use personally is "is the information available through some search system", ie things like Super Hubs, Trackers, etc." This would exclude private torrent trackers, as they are not public.  As an admin, I'd rather hav...

Rather difficult?  I don't think you're familiar enough with Dropbox, because you can easily share a whole folder structure, not just a single folder or individual file with other unauthenticated users.  Dropbox accounts are setup like this by defaul...

From a security perspective, Dropbox is definitely a file sharing site.  You can quickly and easily post a file with public access.  If I'm concerned about sensitive material leaving my business and want to block file sharing sites, this is obviously...