I just agree with the option of the server owners being able to decide whether or not the knife is a one hit kill. The TTT server I play on, the only people who use the knives are people who haven't played since the change to the knife, or have played other more vanilla servers.
I for one enjoyed the knife. It adds an element of paranoia to the game and stops it from being a slow round. Sure, people may die and have to sit out, but isn't that the same with the Scout and the Deagle too? One headshot and they're out for the entire round (Other than body armour of course) The fact is, the knife is no longer a weapon to be feared, it's a weapon to be laughed at whilst you gun them down.
So why not give server owners the opportunity to change the setting of it? Is it really that much an affront to you to give back people what they want if they want it? I kinda' thought that was the point of creating a game mode. To give people what they want, not to simply change the game mode to how you see fit, whilst ignoring the wishes of people. And by giving them the choice of turning it back or not, the people who like it as it is, have it as it is. And the people who want it as it was, can have it back the way it was.
I'm not sure if I'm allowed to ask this, since it's all the map secrets and all that people might not want to share, but where the hell is this so-called "traitor button" on ttt_whitehouse_b2?