I see this move as an inevitable stage in the taming of the Internet Wild West in preparation for the influx...the flood of regular ol' people worldwide moving their consumer, social, and work spheres online.
In the world of the Internet, first came the pioneers, then the first settlers, then many of the original sites whithered to ghost towns, and now new settlements are being built and the greenhorns are arriving. There's going to be a big, big boom worldwide.
The Wild West didn't stay wild for a reason - because the population as a whole was going through a major migration. The same thing is happening here.
As long as folks can still hide behind the "we don't ask for real names here, pardner" etiquette online, then people are only vested in a limited way in their own accountability. Accountability is a huge prerequisite to safety and trust. The larger the culture, the more necessary are trust signals, especially in a non-class-based society.
So some form of standard ID system is inevitable, because it creates accountability.