Whilst, I am very opposed to tracking; especially covert. I do believe the cookie law is bad. Fundamentally, websites can not store content on your computer without your consent. Your "User Agent" is what stores cookies; it is usually a piece of open source software fully in your control capable of only storing them based on any policy you like, including asking you for each site. Whilst it would be nice for all sites to set an "Evil Bit" telling you which cookies are functional and which are for Adversing tracking, this is un-policable.