bind a key to no-op?

I want to be able to set bindings that will prevent WoW from interpreting various <modifier>-X key presses as being just X when there is no key bound to <modifier>-X.

Is there something equivalent to a no-op I could put in my bindings-cache.wtf for these keys? I'm assuming editing the bindings-cache directly will expediate the set up (to set this for all 5 instances, for a long list of key/modifier combos, unless I've explicitly bound the combination to something).

I found a way to do it. I made a macro, named "noop" with nothing in it. Then in the .wtf file you can put "bind ALT-1 MACRO noop" for example, so that hitting alt-1 doesn't trigger the keybinding for just 1. Repeated that for every offending key combination (they can all use a single macro) and problem solved.

So lets say if i have my main bound to wasd and an alt/slave toon bound to alt+wasd, using this macro/wtf setup will allow me to run my main around like usual with the alt/slave standing still, then if i press alt only my alt/slave will move?

For me it works like that yes. I don't edit anything I just bind a macro to an empty button spot on my bar. It easy and it works.