I'll go with stupid but for a different reason.  I have noticed most people treat KC as regular TMD and never bother picking up the dog tags.  I have been on teams that have lost but doubled the other teams kills because no one bothers to pick them up.  I always do, or at least try to often getting shot in the process like most of us that play the mode correctly do.

I was doing pretty well but man my w/l has taken a massive hit lately, I just can't get in with people that know how to play on my team.  I'm by no means great, but I am trying to get better (haven't played a CoD game in many years) which is more than I can say for most people.

As for getting the dog tags, I don't care who shot the guy, if it's hanging out there I'll get it.  It's all about the team win

so you are mad because he confirmed his own kill?  I'd ask who is the one who is ignorant or stupid? 

Who gives a flying rats anus?

They killed the person in the first place so it's their own choice, and their choice is neither ignorant or stupid no matter what they choose. They earned the right to choose, because they got the kill.

If I get a kill, Im not going to purposfully go out of my way to give you XP when you didn't earn it.

If you want to follow a player that can get kills just to scrounge off of their work, then you are just being lazy and you should just shut up and take what you can get. Don't complain when the killer wants to collect his own reward (the tags).

The same goes for when you get the kills. If you want to share it, then fine. If not, who cares? You earned the kill, thus, you earn the right to do whatever you want with the spoils of your kill.

Don't call other players ignorant, stupid or rude for collecting what they earned.