It gets more complex in communities like this because some people do use their IRL names as their screen-names and at least theoretically a “slander” against one person using their IRL name as their screen-name could be perceived to damage others.
Yes, there have been successful cases fought about stuff published on messageboards (I think it was in ATMB that I asked this question almost a year ago when Geoffrey Robertson took on just such a case -I just can’t remember the thread title).
It has been held already that messageboards can be regarded as “publication”, and in fact one of the key arguments AGAINST the case Robertson took on was the launch of the legal action in Australia as opposed to the US (Australia’s defamation laws in the case concerned were far more favourable towards the complainant than the laws of the country in which the hosting server was located).
Defamation laws vary widely, to the extent that in some countries something said in a postcard can be held to be “public” but that same thing said in a letter enclosed in an envelope is not.
Theoretically at least, if I was to post something defamatory in my LiveJournal which damaged someone else who was identifiable, the fact that my LiveJournal can only be read by my friends is no defence. Something defamatory and which harms another is defamatory whether I repeat it to my friends or my enemies (OK, I know that in Australia as in the UK there are exceptions if it’s only communicated to someone in a “special” or “privileged” relationship); the EXTENT of publication might influence the damages awarded, but it doesn’t change the essential nature of the offence.
While our screen-names might offer us a degree of anonymity, there are legal circumstances under which administrators would have no choice but to disclose information which would ultimately allow posters to be identified.
I admin another messageboard - as do many people here - there are circumstances under which I could be compelled to reveal an IP. While those circumstances are mostly criminal (in which case the authorities wouldn’t really need me to reveal ANYTHING, but it would be a lot quicker for them if I did), websites and messageboards are not essentially much different than talking over the fence to your neighbours in a small town or publishing something in a small circulation newspaper.
The fact that someone doesn’t know me - personally - doesn’t prevent me from being defamed. I don’t know most celebrities personally or know where they live or know their real names, either, but it doesn’t mean that I can say whatever I want about them with impunity.
Heck, I’ve probably made enough references to SPOOFE and toothbrushes on these boards that I should be paying him damages forever.
Until the international litigation which is happening right now is resolved, none of us are really going to have many answers, and to be honest messageboards like this one can’t afford to defend even the most frivolous of actions - so if people keep threatening lawsuits, we’ll lose these kinds of forums…