This part of the discussion is (or at least was) about Dick's scaremongering about ATC frequencies being choked up by broadcasts from all those aircraft buzzing around unmarked strips under the J curve and at cattle stations in the middle of nowhere.
I merely pointed out that there are no mandatory broadcast requirements imposed on pilots of aircraft operating at those places, even if they have VHF fitted.
So how else are you going to know about anybody until you spot him, and then what's the point of saying anything?
In case you aren't being deliberately silly: If he doesn't have VHF, the only way you're going to know about him is to spot him and, if he doesn't VHF, there is, indeed, no point in saying anything. This outcome is permissible and the reality under the current rules at unmarked, uncertified, unlicensed airstrips in G (sorry: ForG).