I've been trying to implement this, but things are more complicated than I thought. 1. View forum as guest -> no problem 2. Hide the PM link under user's info -> anyone still able to send you private messages, by filling in your username as the message recipient. If we fully disable PM function in invisible mode, others cannot reply to your PM. 3. Hide last login/last visit -> no problem 4. Hide username/rank/etc. -> probably not a good idea, I think it's important to know whos you're talking to in a discussion/topic. Please let me know what you think.