All they really need to do is implement a mandatory Alias with your Battle.net profile to be displayed in lieu of your real name. You still get recognized as the person that plays X and Y character in game A and B, just without using your real name. It doesn't really help with the whole accountability thing (neither do using real names) as determined trolls will always be lurking about.

I'd be even happier to see them implement controls for explicit authorization to share your real name, akin to one's email, phone, or address, to specific individuals/groups of friends, but simply using a global alias would suffice in the short term.