You’re on the wrong high horse
Google Plus doesn’t have to accept anonyms, mononyms or pseudonyms. The service is evidently not for everyone, it’s not a monopoly, you’re not entitled to customer service - you’d have to be an actual customer to get that - and it doesn’t have to be nice about it. So get off your damn high horse…
…and climb up on this one. The critical issue with Google Plus is the lack of transparency. In exchange for your identity, you’ll receive a bunch of cool services without paying for them. But you don’t know how your identity is being used – it’s a fool’s bargain. This is one of the most dangerous imbalances we can have as individuals - there is no piece of information more valuable than our identity - and the imbalance is drastically tipped toward an exceptionally large, publicly-listed technology company with a dubious perspective on privacy.
You can restore balance by either increasing transparency in how Google operates, or stamping your feet and pleading for anonymity or pseudonymity; the former maintains the service, the latter will result in a less effective service. So if you want the services Google can provide - which are more effective with real identities - then the logical step is to start demanding transparency.
