I know this allegation caused an uproar but I know once I started clearing out my hcookies each time I log out of Facebook, the creepy messages decreased from them such as: those messages that show up in e-mail about "so and so" wants to talk to you, those so called friends and they were people I had no idea who they were; plus some other messages disappeared. So I don't know exactly what this new four tier cookie system does, as the reasons for some the things are legit for the site to function but some of it leaves me to wonder and concerned. So consider clearing your cookies unless of course you like all that it is offering as a part of its system.

http://www.zdnet.com/blog/facebook/f...legations/4044