I reported an issue to the LinkedIn competitor https://about.me two years ago where signing in with my Google credentials gives me access to some the account of some random other person with a similar name to me. I think that during registration, I attempted to register about.me/johnradio (except it's not "johnradio"), but he was already using it, and then the bug occurred that gave me this access.
I randomly check every 6 months or so and yep, still not fixed.
I randomly check every 6 months or so and yep, still not fixed.