If that is an issue, it ought to be raised by those who are being misled, the targets of mail, instead of senders and other third parties.
it IS being raised by them, for those who are actually able to figure
out what's going on. of course, when the recipient doesn't receive the
mail he's expecting, he has no idea where to look - so he tends to
blame the sender.
Keith Moore is not complaining about mail he has not received because
of the dasterdly misinformation from the RBL. He is either a third
party sender of reject mail that he is certain was wanted by its targets
despite being rejected or he is a fourth party presuming to speak for
the first parties (spam targets) against the second parties (blacklist
providers).
You are a barefaced liar.