Frankly, I think that stealing another person’s assassination shouldn’t even be allowed.
Stopping the animation by killing the person, absolutely. Showstopper medals are absolutely alright, if not a bit of an annoyance in that someone can even stopping you from killing someone that’s in your grip even now.
But you didn’t work to get that kill, and your teammate clearly has it under control. You could be dedicating your time to killing another enemy in the area, and furthering victory, not furthering your own agenda by being an -Yoink- and taking a single hard-earned kill away.
What’s even worse is when teammates are so incredibly belligerent and ignorant that they don’t pay attention to anyone else to get their kills.
In a single match today, I’d already been betrayed once by way of Incendiary Cannon, because this guy was so intent on getting his Forerunner Ordnance that he didn’t care if there were five teammates in the area if it meant he got to fire that thing at one guy. I got vaporized by it, considered booting him, but he apologized profusely, so I let it go once.
Later on, after helping him to further his goals by repeatedly securing Forerunner Ordnance for him, I’d been trying to get some kills of my own. Whenever I see an assassination open, I take it-- I’m more of a full-frontal assault type of guy, so that’s going to be a difficult Commendation for me to get. So when I have my knife in a guy’s neck, and get sniped by the same guy who’d earlier betrayed me, thereby letting the enemy go just to snipe that guy?
Oh my God. The boot button was never used more quickly.
He insisted he couldn’t tell the guy was being assassinated. Except for the fact that he was directly behind me, and there was no way he couldn’t have seen me.
TL;DR: Assassination stealing is awful. Greedy -Yoinks!- willing to screw their teammates for a quick kill are even worse.
Thankfully, it seems most of the community has grown up a bit, in my personal opinion. When I manage an assassination in SPARTAN-Ops, no matter how lengthy and over the top the game might have made it, most people will concede it. Even in standard multiplayer, most people will concede the kill. This is quite refreshing from Reach’s community, which scrambled to get any kills by any means necessary.