I am thinking about scraping deleted subdomains with PR on high authority web2.0 site such as wordpress. There are a couple of threads about how to scrape them using Scrapebox. I have doubt regarding these subdomains, I understand they hold PR which is valuable, but the only reason I can see they were deleted because of spammy, these domains are not like expired domains. So the question is backlinks on the spammy subdomain with PR is postive or negative for SEO? Sorry for my poor english.