From Eric: Does a mark or a delay constitute an "effective bar" from participation on this list? I think not, although I'm entertaining arguments. A mark? No. A delay? Yes. Delays hurt the readers more than the posters, and help make discussions even more incoherent than usual, a bad thing for everybody IMHO. Marking is cool; validating and including a validation mark [yes/no] is even better. Forget the delay idea; it seems to me to hurt things more than it would help, and punishes the wrong people. No amount of coercion (at least no amount that I anticipate now) would get me to use digital signatures on my outgoing mail, until it gets substantially easier for me. It is hard enough to keep up with this list as it is. -- <dat@ebt.com> (david taffs)