Ok, I apologize for confusing you all. I re-read the article again and the only way someone on facebook can see you visiting this site is if our forum puts a Facebook "Like" button or link on the website.
So for example if there was a Facebook ""Like" button on the db page of for the HG "BMW" and you pressed it, then all your Facebook friends would know right away you approve of BMW and like her.
Thankfully our forum still has common-sense and will never join the Facebook community as it would be suicidal and mean the death of this forum.
Here is the link to the article.
http://www.slate.com/id/2251646/
On a personal note, it is amazing how much ppl share with each other. I like to remain mysterious even to my friends and family.