[anonypla]

My take is: Privacy is when people know who you are but not what you are doing. Anonymity is when people know what you are doing but not who you are (some people will argue this is pseudonymity but I disagree with them in a practical context). Basically Batman is "anonymous" and Bruce Wayne is "private".

[LocalH]

There is also a difference between truly anonymous (where no connecting identity is established between different events) and what I'll call a form of pseudonymity (where an identity is constructed, with or without a known connection to one or more real identities, and that identity builds its own reputation). I do not consider Batman "anonymous" unless he does something without revealing that it was Batman who did it. Batman is pseudonymous, simply because "he" is a known identity, whoever may ever be behind it at any given time.