I'll start. Yes, someone beat you to YOUR spot. Setting up 50yds away from them, may not be the best thing. That person may be the bad calling, loud dog owning, duck flaring, sky busting, early leaving A-hole you hate? (or maybe your that person) Now, because he was in your spot, and your going to teach him a lesson. Your hunt may be wrecked also? Just go set up somewhere else. So my point. #1.TRY TO SET UP, AS FAR AWAY from others as you can. It's best for everyone.
#2. O' $#IT! you over slept, buddy was late, what ever? Your late. DON'T drive by 10 other spreads/guys to find a spot 15min. before shooting. Grab the first spot you see. Just be happy, you still got out.