Funny - because just last week I setup new dummy google plus accounts for various family members in Europe and India so we could use hangouts without polluting our regular gmail accounts with Google+ nonsense. We won't need that anymore - We were perfectly happy with Skype, but missed group video.
I work for Google, so I'm obviously biased here, though I don't always like everything we do around our sites and integration. But, I'm genuinely curious, what nonsense does Google+ pollute your regular Google account with? I believe that you get a profile page, but you can leave it entirely blank.
If it were Gmail, that would be really useful. But it's not. It's "Bobby Noname added you to a circle!" and "Joe I'veNeverHeardOf invited you to a hangout!" and "Spammy McSpammer liked a your video on YouTube!"
I don't need or want any of that nonsense. G+ isn't useful to me, but I don't have any way of turning off the notifications.
Oh, and as a bonus, the G+ API isn't working. Doubly annoying. http://shkspr.mobi/blog/2014/04/extracting-your-own-location...