You know what I want, I want a better option when some site says, "to access this file we need to see and download your entire address book". I want more than "yes" or "no". I want "lie to it." Give it an address book full of noise. Tell Dropbox I only know one person, but he's the Pope."
@mhoye Alas I haven't found such a broad liar, but for other info like browser location spoofing there's https://addons.mozilla.org/en-US/firefox/addon/location-guard/
Why of course I'm in London now. Wait, nope, I'm in Moscow. Or Dubai. Or...