Go read the hundreds of posts surrounding the silly debate about the Dropbox Terms of Service clarification. Any online service that accepts user-uploaded content is basically forced to include this clause (or something similar to it) to get around legal oddities to even show you the very own content that you uploaded, not to mention your friends that you're sharing it with.

People that have no idea what they're talking about read these items in Terms of Service and scream bloody murder while the rest of the technical folks go about their business because they know the legality behind it.