Alpinfox,
This is a serious discussion, so I hope you are not kidding and polluting what constitutes a "big wall"
Concerning CARABINERS:
I was sitting around in hut in the bugaboos discussing this issue "what is a carabiner" with my very close climbing friends waiting for a weather window to open up. Mike said it was to help climb, Beth said," if it is to help you climb, wouldn't it be aid" And I, playing devil's advocate said , "then all climbing is aid",
What if you don't even fall on a carabiner, would you consider it used for climbing, what if you were just "rapelling" or "HEAD POINTING"
We didn't decide anything.