Too much information?

In case you've been wondering, you can have 256 columns of information in one row of an excel spreadsheet. Lately, Wonder Woman has joined the facebook crowd and she keeps on asking "How do 'they' know I might know 'soandso'?" I'm more than a casual member of a business version of facebook, LinkedIn, and have had the same response. These people seem to be able to figure out if you met someone at the mall 12 years ago. So when I joined facebook a few days back so I could do some searches (but really not wanting to "go there" when it comes to "building my network), what do I see in the ad on the side? Yep, "Need more hair?" So, somebody out there is using more than excel to track information on you and me cuz there's more than 256 points of data. A little scary...perhaps...but look on the bright side, maybe I'll stop getting spam for a breast enlargement.