[thoradam]

How about if browsers implemented this cookie system: Each time a cookie is set, you could have the ability to mandate when that cookie is sent out. For example with a Facebook cookie you could tell the browser to only send that cookie when your address bar reads facebook.com. Problem solved?

[executive]

They do.. it's called disable third party cookies.

[thoradam]

No that's for setting cookies, so that website A can't set cookies on your machine while you're visiting website B.

What I'm talking about is the ability to limit when cookies as sent out with requests. Privacy wary users could perhaps have their browser set so that for example Facebook cookies are not sent to Facebook just because you're visiting a website that has code from Facebook on it, but only when you're actually browsing Facebook.