What is the difference between buying fake views/accounts/friends etc. or backlinking and other SEO 'tricks'? Unfortunately for them, both companies have to cur

What is the difference between buying fake views/accounts/friends etc. or backlinking and other SEO 'tricks'? Unfortunately for them, both companies have to curate their product. For a google example, see the Rap Genius issue from awhile back: http://genius.com/Genius-founders-rap-genius-is-back-on-google-annotated http://genius.com/Genius-founders-rap-genius-is-back-on-goog...