You're a loving idiot.
Most of the game's very basic functionality is entirely within the engine and cannot be manipulated. Crouching is one of those things.
There's nothing you can package to disable walking, looking around, etc.
Don't be dumb like that.
See what I did there? I just lowered the credibility of your post by belittling you with my first words for no good reason. Don't loving do that again because it makes me want to internet punch you. [/toughguy]
All of those things can be disabled, and actually relatively easily. Walking can be blocked in numerous ways, from freezing a player, to the "no move" playertype, to all the tasers and tranquilizers and stun guns we have. I admit that those are not usually packages, but nevertheless, you don't need to be an offensive butt about it.
Looking around has been disabled with the static camera in camera events, also.
But really, if the client can tell the server what is happening, then you can, in fact, package and disable it if you are able to find the functions.
also, idea:
maybe the trick to blocking crouching is to block the animation playthread?