Paws, I understand your reasoning, but just like hutcheson I think it's highly doubtful that this will be implemented. It's not only that we can't control what our licensees, search engines and others do with our data, and that PR is not something that we take into consideration, but why should we tag our links, which have been manually reviewed and therefore are supposed to lead to relevant and useful sites, as potential spam? To me this sounds counterproductive, even if your intentions are good.
But thanks for the suggestion.