amazon review literature

There is an emerging genre of edgy/sarcastic/snarky writing (on the internet? really???!) in some amazon product reviews. Check out these examples:

Quarter million dollar diamond ring
http://www.amazon.com/Platinum-Radiant-Trapezoid-Sidestones-Certified/product-reviews/B001G603AE/ref=dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1

1 gallon whole milk ;”This product copiously leaks out of my nose whenever I read these reviews.” :
http://www.amazon.com/Tuscan-Whole-Milk-Gallon-128/product-reviews/B00032G1S0/ref=pr_all_summary_cm_cr_acr_txt?ie=UTF8&showViewpoints=1

The steering wheel laptop desk I previously noted: http://www.amazon.com/Mobile-Office-WM-01-Laptop-Steering/product-reviews/B000IZGIA8/ref=dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1

and of course the original, 3 wolf moon tshirt:
http://www.amazon.com/Mountain-Mens-Three-Short-Sleeve/product-reviews/B002HJ377A/ref=dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1