I know that some people disagree with their tactics..
Well especially the idea of being in a workplace, having your gun, and then barricade yourself in the office and LET ALL THE REST DIE.
Yea I do disagree with that one. Can you imagine hearing your friends scream as they are murdered not one cubical away while you hide clutching your gun.
And yes, the knife thing is overdone. Now I like his way of showing different ways of speed opening the knife from the pockets but if have a choice between the knife and a gun, I'll pack the gun.