Broadway - 11:35 pm on Mar 6, 2013 (gmt 0)
To me, the point would be that by not allowing the use of pseudonyms Google promotes an environment where deception is encouraged (as evidenced by the the several comments above).
I'm sure very few people setting up false accounts have any malice in mind, which is exactly the point Google is missing. Anonymity does not equate with bad behavior. And in many cases (especially when posting comments and participating in forums) it can significantly elevate the quality of content.