With even current remailer architectures, it's trivial to simply have different services for normal remailing (which leaves body intact) and stripping services that grundge the message arbitrarily. When we really want anonymity, for instance, we will need message rewriting services that break the correlation between authors and writing style. A friend of mine looked into that material and claims that such analysis can do a depressingly good job at figuring out what messages were written byt he same author, even if the author tries to stilt his style. dean