on public land , it's kinda first come first served.since he already had his blind setup, then I would say he was first come. JMHO
I always take my light and flash it a couple times to let that person know I am there.whistle or speak lowly.ya never know when they may shoot at a turkey or other bird that takes off flying in youre direction.ya may get shot outta your tree;let them know you there..