Nik Cubrilovic on a Facebook cookie that tracks you, even if you are not a Facebook user:

The cookie was being set even if the user had never been to the Facebook site, and even if they didn’t click a ‘like’ or ‘share’ button.

Damned good reason to never pollute your site with a Facebook button.1 It was present on my computer…


  1. I am contemplating the removal of the Tweet button on this site.