Good point about ground blinds made a while ago (Likely Bigred)... Back to original scenario... I'm in a ground blind with my rifle set up to shoot toward a known deer funnel. Let's say village idiot # 2 is set up near the deer funnel, in another ground blind. A nice 6-pointer walks out, I glass with binoculars, and then take aim. Village idiot# 2 has passed on the 6-point cuz he thinks it was pushed out by a 10-point (but I want the six). Now, I level on fur (on 9-power, I assess the backdrop of the target 250 m away (looks like grass and trees to me) safety off, finger to trigger, breath, squeeze.... That's how village idiots get shot...
I guess what I'm saying is it wouldn't hurt to be showing some orange (within reason) In my understanding, deer don't see orange anyway. So, even if the archer is up the tree, I guess I'd recommend he shows some orange nearby. This is a piece of private land and we are expected to manage ourselves (in terms of "who's hunting where). That guy (unless we contact each other) has no-way of knowing there's someone else in there, because there are so many entrances. Even at that, the landowner (i know him well) is the kind of guy to say "there's a few others that hunt in there, but go ahead..." and not tell us thinking "oh they'll run into each other". To my knowledge, there are only two people hunting the property so it's still awesome, but when I find the guy, I'll politely explain the village idiot story...
D