Don't you think the real Andreas Winsnes would stand up if he found out that someone was using his name? Let me answer that question: I certainly would. Most people are not able to pull of phising scams, as far as I know, and one can therefore weed out most cases of fraud by checking people's identity. I get your point, but if one person's reputation gets badly hurt, then that is one too many, and an apology might not be enough.
I am not out to get NAFPS. On the contrary, I hope your arguments in favour of anonymity can withstand criticism if an innocent person some day gets wrongly accused.