Jimmy, as I stated I think this will usually be the case in a crowded hunting area and not always will it be fair but really what do you do! Any guy who would tag another's animal is better off out of the woods and especially after he heard the shot so close...at 30 yards I am not sure I would have picked the pine needles out of my teeth yet from hitting the dirt much less shoot at a deer
] It does suck and may happen but I wouldn't let some idiot ruin my trip or fun, just move on and not dwell on it is my suggestion. I have seen where this will fester and ruin a whole trip, last year we got flagged in elk season the other party setup while we were calling and they botched our setup on a herd with their stupidity and greed. Some were absolutely fuming in our group calling them every name in the book and really screwed those guys for the rest of the day, funny though 2 of us took it in stride and dealt with it, sure we were pissed off but really what can you do after the fact....nothing! That evening the 2 of us set up and were able to draw out a 6x6 that was the other guys first elk. Mentally we never let a bad experience take advantage of us, we just started over and it resulted in an animal on the ground. You have 2 choices worry about what you can't change or actually go out and change the history, even if you don't connect my bet is you'll feel much better than stewing over spilled milk!
Kevin, I ceratinily hope your comment was with sarcism, telling a hunter to aim for the head vs the vitals is not the right answer here. I have seen way to many botched head/neck shots to even suggest one attempt to take them much less not knowing that person's ability or shooting skill level!