On the internet, as the New Yorker cartoon
famously noted, no one knows you are a dog.
Anonymity, and pseudonymity, have been features (or bugs) of online life since the internet's inception.
Google is moving away from that model towards one where a single account, under your real name, manages Blogger and all of your Google services.
Update: Google has dropped this idea.
There are some very good arguments for that approach. No more anonymous internet trolling, at least on Google+, and some clever new ways to promote and publicize your online projects (such as your blog) with you as the hub.
But for many of us, managing our online identity is nuanced and compartmentalized
by design. Adopting the new model means surrendering our freedom to be creative.