"O" == Optim optim81@yahoo.co.uk writes:
O> My opinion is that an anonymous user (IP user) still owns the O> copyright of his or her works he or she uploads.
IANAL, TINLA. I think that should be pretty darn clear. Using a pseudonym or no name at all shouldn't strip you of your copyright.
However, I do seem to remember some talk about how a publisher can manage and enforce copyright on behalf of an anonymous author, until or unless that anonymous author steps forward to enforce and manage it him or herself. I don't remember if this is Anglo-American tradition, European, or both.
I think it might be hard for, say, Wikimedia to try to claim this role of publisher w/r/t unidentified users on Wikipedia or other projects. The publisher of an anonymous work is usually aware of the real identity of the anonymous creator. Wikimedia does not know the identity of IP-identified users.
~ESP