Not to trivialize his opinion, but I always thought it was a wide spread notion that not allowing anonymity will lead to only "politically correct" or "harmless" opinions to surface.

I made the same argument when one of the Norwegian newspapers I somewhat read regularly (online) started requiring full names in the comments sections. The comments sections are now completely boring and predictable, and any really important but sensitive issues that would really need a minority voice in the debate are just not debated at all.

At least not on a civil level. There are always those who blurt out anything even under their full name (although possibly fake), but these tend to be the same people who are not really able to articulate a sensible and constructive argument for their case.

Personally I have opinions I would not like to link to my real name, since I need to work for a living in a place where we have customers and such...