"[Also, if you think about the suggestion to voluntarily restrict the number of postings per day (or perhaps per week if that permits more flexibility), which may be worthy of consideration, why would you expect the "garbage posters" to abide by that restriction when they have so clearly violated other polite social expectations?]"
Good point, but we DO have consequences on the road for those who choose to violate highway "etiquette" (laws); some people can't conform to social convention without them.
Seems like that's the case on this list, too . . . .