We never thought anyone would, but there was political pressure at the time from people who didn't (and I see some still don't) understand the "voluntary" part of the way standards work.But John - of course any spammer will respectfully honor a "no solicitations" flag, either delivered by RFC 3865 or the DNS Text record the OP is requesting... :).
Of course. And they will implement RFC 3514, too. R's, John