Google, for example, amongst other things insidiously changed “Terms of Service for Blogger.com” to “Blogger Terms of Service”. (Vote of thanks to whichever Supreme Being I’m following today that I don’t use Blogger!)
All joking aside (and remembering the outrage at Facebook – hope Twitter doesn’t own all my tweets?), this could be a very practical tool.
p.s. Facebook did allow its outraged users to set up a community on Facebook to campaign against the change.