I'm not sure how LinkedIn does it but their "recommendations" are very spooky.

I get some really odd ones like the property manager we pay rent to. I've only ever emailed or called him.

I presume he gave LinkedIn access to his email contact list but based on the number of these creepy recommendations a lot of people I email with must do it.

Even more spooky are the recommendations to connect with people I don't know but have names that match people I do. Anyone know how they do this?