As you know one of the super annoying things in Arma is that you cannot have no weapon selected by default. As soon as you drop your current weapon your character would take another available weapon until you drop them all. This is major pain in the butt. unit selectPlayer "" does exactly nothing. However I recently discovered that you can force no weapon with action "switchweapon"

The problem here is that it has many bugs, weapon and animation as no one until now has bothered to make it a feature. One way of doing this would be to make scripting command unit selectWeapon "" to select no weapon and also add another way of doing so in action menu and keys bindings as well as playAction action.

It does look ok you know: http://www.youtube.com/watch?v=ndK9Ng0oaMI