> 99% of raw data is useless. Just as a rule. Well, as a non-facebook user, I think 99.9999% of facebook data is useless :) But facebook is in the habit of tra

> 99% of raw data is useless. Just as a rule. Well, as a non-facebook user, I think 99.9999% of facebook data is useless :) But facebook is in the habit of tracking everyone's surfing habits across the web (through "like" links), and I assume they do more than just "increment a counter with it", even if they don't keep every single detail.