He can't. HC deleted all the reviews due to the outrage that was happening in their forums because of it. They wouldn't even allow Krank reviews for the longest time.I figure you're the one to ask since you signed up today to make this post, so here goes. Can you back that up with any proof?
I guess the only real proof that it happened is if you can still find those old threads in the HC forum, and that the newest review on the Revolution is from July 06 when the heads been around since 2003.
Myself, I remember the product spam that was happening on a couple of forum at the time... as well as reading the HC threads that guys were linking to in the spam threads.
That said... I too found it odd that someone with only 1 post would post such a thing....