This might sound like sarcasm to us but I've honestly heard people claim this with a serious face, as well as: "I'm not doing anything bad, so they'll never block me". Guess it's not a problem until it actually happens to them.
There were pieces of news about google accounts being blocked for being "associated" with an account that did bad things.
I think most were contractors using both their own accounts and the customer's accounts to put apps in the play store... which will associate you with random people that pay you to make an app, maybe forever?
Having an identity provider service intermingled with services by the same company and not differentiating between providing the identity service and any other service is the core of this problem.
Really sad that Mozilla Persona did not make it. To me this was promising solution for 'identity provider service'.
This section of service should be heavily regulated since it hs a lot of power.
/sarcasm