In my niche, a spammer has created 12 identical sites with no content but just spun articles and they have used over 100 expired domains to rank ahead of everyone else.
For most search terms, they get atleast 4-5 of their spammy sites ahead of everyone else.
They have no other backinks but pure achnor spam from expired domains. All of their 12 sites are less than a year old and still outranking very old and established sites.
They have been reported to Google many times but Google doesn't care much about spam reports.
Is it fair that negative SEO should be directed at a spammer to expose them?