An anon user (which I assume stands for "anonymous")
doesn't seem to be very anonymous. This particular screen shot was taken from a post which I found by following a link on a (very non-anonymous) StackOverflow profile:
Ironically it's on security.SE regarding privacy.
If it's really intended behavior that the post should be listed among the users Top Network Posts, I think it should somehow be clarified that the user is not in fact anonymous.