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Facebook has an explanation on that page:

> You can see your name and profile picture because you're using a computer network you've logged in on before.

At least, that's what I saw when I did it on myself in an incognito tab.

That explanation does not inspire confidence -- I was able to retrieve the profile picture, name, networks, and barely-obfuscated email addresses of several contacts for whom it is impossible they have logged in from my network (on a VPN to the office) or my computer.

Are they "associated" with you? E.g. are they people Facebook could know you are friends with etc.?

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