@oldtimer I agree that the situation is as you describe it. It is the solution you propose I find at best implausible. Who is going to be the arbiter of what these new companies send and to whom? A new international advisory committee? What if individual domainers disagree? How long will it take to set up then how much longer to prove its effectiveness?
Why international? I'm in the UK for starters. Looking at the grammer of much that is written on these hallowed boards, not everybody is a native English speaker and there are certainly some from the Indian subcontinent plus from several European countries, Asian countries and Australasia. None of us would be answerable to any solely USA institution.
Domaining as an industry is still too small to get enough of a hearing from the likes of W3C and ICANN bodies and their subcommittees. To them, so what if the domaining industry gets itself a bad name and self-destructs? Who, as far as they are concerned, is going to miss it? So where to from here? N.B. I understand the arguments. Let us, please, not have a page or several of explanations of how valuable we are. I am converted already. You need to tell ICANN
et al.
In the meanwhile, I think the unwilling recipients and the member organisations the unwilling recipients belong to will find their own solutions. Beginning with the social media organisations banning such activities and insisting anybody who wishes to approach their members do so via their own internal, fee collecting, existing mechanisms. That will solve more than the domain name spamming and is overdue anyway.
Soon afterwards the RBL lists will be bolstered by a new membership of domain name spammers and email hosts will be closing their accounts. As has happened with sexual "enhancement" therapies, a prince has given me a few million bucks to disperse scams and other antisocial activities.
Nothing, as you so rightly note, is going to completely ban all of the idiots who think they can gain an edge but compare how the early days of penis enlargement therapies was seen as a laugh by many has become almost universally unacceptable. Lists of poor quality domain names aren't even slightly amusing and will very likely follow the same course.
All of the above is likely to happen before agreement can be reached on how some system of "independent" spamming companies can be agreed and the first companies appointed. And if it happens after those companies have started work, how will they be recompensed for the inevitable financial losses they incur so soon after startup?
So, to get the ball rolling, the best we can probably do for now is to tell the social media moderators or other organisations we belong to when we receive domain name (and other) spam.