Imagine your blogger account being deleted just because your profile is an alias?
Lose your email?
Lose your google docs - all those spreadsheats?
There are reports of Google deleting blogger and gmail accounts due to people using aliases on google+
I use an alias on this blog. Most gold bloggers do.
I refer you to Google+ AUP
13. Display Name
To help fight spam and prevent fake profiles, use the name your friends, family or co-workers usually call you. For example, if your full legal name is Charles Jones Jr. but you normally use Chuck Jones or Junior Jones, either of those would be acceptable.
zdnet.com : google plus deleting accounts en masse no clear answers
Slashdot : Google Account Suspensions Over ToS Drawing Fire
I quit WoW over their linking real name to their forums before they reversed it. I still won't use Real ID. I will not use Google+.