I had a similar experience with LinkedIn, which also suggests they are using IPs to discover people who may be connected to you. In this case, I had gone into a

I had a similar experience with LinkedIn, which also suggests they are using IPs to discover people who may be connected to you. In this case, I had gone into a local coffee shop, used the free WiFi, and then when I went home and accessed LinkedIn from my desktop PC it suggested several of the employees of that coffee shop as possible connections. I thought that was actually pretty scary - normally, if you're a service employee at a business, the most a customer is going to learn about you is the name printed on your name tag. In this case, after buying my coffee and going home, I was presented with the last names of these employees and whatever other information was publicly visible in their LinkedIn profiles.