Somehow it seems unfair for Google to suggest that people spend time with the disavowal tool to correct deficiencies in Google's algorithms.
So:
company pays crap SEO to place spam links all over the globe to increase google rank
google increases page rank
crap SEO works a bit more together with 1000's of fellow crap SEOs
google increases page rank
google notices problem, starts penalizing sites with crap ranks
companies that previously employed crap SEO to spam now pay crap SEO to blackmail site owners previously used to place spam links on to remove links 'or else'.
Really, this is not a good development. The burden of dealing with spam is bad enough, now we need to deal with being blackmailed by SEO spammers to clean up after them as well or risk being penalized in google? wtf?