Even if return e-mail addresses could be added to posts and IF Max wanted to do it, I could fake my e-mail the same way as I can do in a newsgroup post or e-mail list. I could get a throw-away account with Yahoo or someone. Not only that, but you mention spammers harvesting addresses. What's to prevent them joining and getting everyone's e-mail? I'm fairly sure that if e-mail addresses started appearing here, more people would opt for "GUEST" status rather than the one who would join.