Sad but true. PPrune pages have made their way into court and ASA have a Sydney firm trying to identify employees! But just becasue Big Brother is watching doesn't mean you shudnt spit in his eye... in fact, it's a damn good reason to if you ask me.
Just set up a communal account that everyone uses, then there's no way to know who posted what because everyone has the defence of plausible deniability. You just have to make sure more than two know about it. So, for instance you might write the login details on a White board and take a photo in the extremeley unlikerly event anything comes of it.
Now let the show begin!!