The key lesson that one should take away from this is that one should not, except in extreme circumstances, post material "anonymously" on the Internet if anonymity is truly important. One should particularly not expect to get away with disparagementregardless of whether it arises to being libelsolely because "they won't know who I am." They do. You would be absolutely shocked at how easy it is to backtrack from most bulletin board systems if there's any chance of access to system logs. Well, maybe you wouldn't; but that's no skin off my knuckles.