Sounds like it might be a page caching issue as I've been shown as logged in as 6 different users now. Can see emails, names, and other personal information. WTF Valve...
https://www.reddit.com/r/Steam/comments/3y7le9/im_logged_in_as_someone_random_on_steam/
LIVE FEED: https://www.reddit.com/live/w58a3nf9yi53
https://www.reddit.com/r/Steam/comments/3y7le9/im_logged_in_as_someone_random_on_steam/
LIVE FEED: https://www.reddit.com/live/w58a3nf9yi53
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