[clifflocked]

OAuth exists and can be used to confirm someone's identity by linking their Google account.

[nixpulvis]

To be fair, I wouldn't want my google account linked to my dating profile. Aggregating services has risks too.

[knicholes]

Maybe secondary google account.

[kelnos]

Linking a Google account doesn't confirm your identity, though. It just confirms that you created a Google account with a particular name.

[smt88]

A Google account does nothing to prove identity