True, but you're still talking about people who felt it was important to leave a review. I try to leave reviews of everything I buy, but I frequently forget to do so if the product performs as expected (neither exceptionally good nor bad).
I could care less about a bunch of unwanted emails in my inbox, but the pollution of the online community review and advice spheres is what really pisses me off about cnuts who try and game stuff.
They're polluting our collective consciousness quite literally.