[zx2c4]

So far as I can see, the Hangouts implementation still uses XMPP, and even sends some federated messages to other servers. It looks like there has been some kind of code added to specifically block the functionality for which code already exists.

[drdaeman]

This is interesting. Could you publish your findings, going a bit more with details?

[voltagex_]

How are you able to sniff Hangouts traffic?