Why does it need to be a moral issue? It should be easy to believe that people will behave differently in an environment with "real" looking names than in one with arbitrary gibberish pseudonyms. They then simply need to believe that on aggregate a social network with the former environment will be more successful than one with the latter.

As for who cares, at least I do. I can't think of anyone whom I care about enough to follow on G+, but only know by a username or nick of some kind. In all but a handful of cases the real name is the primary identifier I have for those persons, the nick is just some added metadata. I find e.g. Twitter's handling of names to be rather repulsive, and it's probably one minor reason for why I repeatedly bounced off that platform.

Admittedly I'm nowhere near as passionate about this as people ranting about how evil the Google+ name policy is, and how as a result they're going to delete their Gmail account, switch to Bing, and block Googlebot. So maybe it would have been more pragmatic to give into those people and turn Google+ into a free for all wasteland. Depends totally on what the ratio of people who strongly hate the policy is compared to the people who mildly like it.

(How is this supposed to be an anti-hacker mindset anyway?)