Turning strafing off

Hi, I am currently working on a fretta-gamemode and I am trying to figure out how to turn off strafing for all players. Do I just unbind those keys? Or is there a better way?
I mean, I can use

 player:KeyDown( IN_MOVELEFT  ) 

to figure out if they are strafing left, but I don’t know how to stop it.

make a timer when they press it then after a set amount of time do you blocking function

Inside http://wiki.garrysmod.com/?title=Move change the MoveData.SetSideSpeed to 0