Thats just the rule here guys. No hijacking another member's sale thread. If he had offered his up, even at the lower cost, without mentioning Raden's sale post he would still be a member here and be able to sell his knife without issue. As it is, he effectively thumbed his nose at the mods, the rules and then gave Raden a big juicy wet willie. At least, thats how I see it. Even were it not the rules here, I'd expect that you Hogs would never go over the top of another's head, in public, and state that, "he's selling for $XXX but I'll knock $100 off."
Thats just not cool. Not unless we're all salesmen trying to turn a profit.
Further, its not any certain mods doing this. I guarantee you that WM simply accrued enough infraction points that the system automatically banned him.