Don't just warn users - Block Cookies!

Many of the other "Cookie Control" extensions in the JED merely warn users that cookies are going to be set.  Some others allow cookies to be set - then quickly remove them with JavaScript.  The only other extension I would consider worth using is Kookie Grab - but Kevin Griffiths (the author of that extension) engaged in fraudulent voting against other extensions and got himself and his extensions removed from the JED.

This extension prevents them from being set in the first place.  Session cookies - all browsers, Language cookies - all browsers, 3rd Party cookies (with PHP 5.3) - all browsers, JavaScript Cookies - IE8+, FF, Chrome, Opera.