You should read +Audrey Watters
's smart post on the important role of web anonymity/pseudonymity in education, especially for students.
I still think Google+'s crackdown on pseudonyms is more about an overreaction to commercial profiles and a total lack of resources allocated to verify identities or complaints about identities. Identity on G+ right now is like a big slippery fish flopping around from side to side in the boat.
But when it comes to students in particular, Mark Zuckerberg's dream of everyone always writing and sharing everything under a single identity has always been way too utopian. Google+'s Circles wouldn't exist if that model worked. We aren't the same people in every room.
Google came up with a sophisticated way to think about sharing content with circles, then gradually developed a nuanced way to disclose or hide gender on the fly. I think Google needs to figure out something similarly nuanced for registering and disclosing the rest of our identity too.
Also, you know what? The more people join Google+, the harder it becomes to find people uniquely. Handles (whether pseudonymous or eponymous) might just flat-out help.