It is in fact extremely hard to gauge. My argument here was not a very strong one. I think however that your argument is equally weak in that it assumes people to be at the same level of respect, much as mine does little more than assume people to be at a higher level of respect.

Regardless of this, anarchy theoretically does not require people to be universally or even any more respectful than they already are in order to function adequately. David Friedman addresses this in The Machinery of Freedom.