Edit: If someone is caught posting fake positive reviews to boost a rating[1], that doesn't make it okay to post fake negative reviews 'to fight the good fight'.

[1] As opposed to impugning someone's character via impersonation, as appears to be happening here

In any case this will make for an excellent marketing campaign. I don't even know what the book is about (I assume something politically charged because of this campaign) but now I know the book!