I signed up for a second Facebook account because of pressure at work to "like" our company page but I didn't want my main profile linked with where I work. I liked the page and never signed back in. I get constant emails from Facebook "Do you know these [5] people?". They're all people I know in real life and am friends with on my main profile (which is kind of creepy, my second profile has no friends), of course I'm not going to friend them again.

If Facebook is smart enough to know that my second account is from the same person as my first account, how are they not smart enough to know I'm not going to friend my friends twice?