Fencer: somebody who knows my real name can use the action point statistics (which is stored "forever") to gain insight into how often I play games (instead of doing something else, for example). At least that's more related to privacy than some other options you have implemented.

However, I'm not going to argue this any longer; it's your site and you choose what to do; I hope I've said my opinion clear enough so this is my last post on the topic.