aatteka··on Creepy visitor tracking using LinkedinIt doesn't work without a token (apparently it did some time ago http://blog.makensi.es/post/3679713636/fingerprinting-your-v... )You can get a token from Linkedin itself.
aatteka··on Do you trust Google?More details here: http://lists.openid.net/pipermail/openid-security/2013-Decem...
aatteka··on A list of Google's corporate Active Directory usersJust a dummy e-mail. You'll get back either an error response or the IP address of the machine.