What Herzlos said.
But look at the context of the event. If you sit down with a veteran player and decide 'Yeah, let's play some tough match-up games', great, go for it, bring your Knights (that you wasted lots of money on). But against a new player to your FLGS? Why the hell would you want to discourage a new player so badly that they never show up at your gaming store again? Why wouldn't you discuss with him the kind of game he'd want to play and then cater to that, instead of roflstomping him out the door?
That's my bias with Knights, and armies full of fliers, and pretty much anything made to be WAAC or 'super competitive' or what have you. It makes no room for games that promote the hobby, particularly to new, potentially inexperienced players.