[zzo38computer]

My own opinion is that if these messages are on public newsgroups/forums/mailing-lists, then they should remain public. Those who do not wish to make them known all the time should use private communication (or use a "non-archive" kind of communication, such as speech or live chat or whatever, but then you take a risk). (I do think that even (especially) for public "archival type" communications, you should perhaps be able to hide your identity from being tracked if you wish, whether by occasionally changing your account, using a different account name on different forums, or whatever else you might want to do.)