Krazykiwi @ Kiwitopia

http://www.geekwire.com/2015/amazon-files-first-ever-suit-over-fake-reviews-alleging-calif-man-sold-fraudulent-praise-for-products/

So far, this is over physical products, where vendors were shipping empty boxes in order to get "verified purchase" reviews. 

But it's nice to see them actually taking this seriously. Unfortunately, I guess it's only feasible in larger organised schemes like this one, but it's a start. 

ETA: Just as I posted that, I spotted Carufel in the comments with an incoherent rant about GR being a hotbed of fake reviews AND Anne Rice being a forum bully. Heh.