What is the best way to get back at a betrayer like the one that betrays you if you beat them to a power weapon?
IGNORE them, or kill them in a crowd of people, so they’ll have NO idea who did it.
Run them over in a ghost and take it back if it’s slayer.
If it’s ctf see if you can annoy them enough that they betray you and hope you get the option to boot.
You can also leave negative feedback on their profile, but I doubt this does a lot anyway.
betray them and -Yoink!-
If they get the sniper rifle, I stand in front of them until they betray me. Or wait until they get into a firefight, and become no shields, and then i kill them. The enemies get the kill, but i imagine it get’s annoying when i do that to them all match.
Btb ragnarok today, teammate sticks our mantis at start of match, blows it up for no reason. Little after I get the sniper and he comes up to me and punches me constantly, good thing there’s no friendly fire. So when he gets a sniper rifle I folow him and do my best to stand in his field of view.
I also tell everyone in the game to leave them bad feedback. Hopefully it adds up.
In taking revenge, a man is but even with his enemy; but in passing it over, he is superior.
Francis Bacon
“Homer mad! Homer smash! Get revenge on world!”
— Homer Jay Simpson
I picked this up from around the waypoint but a good idea if someone is about to kill you for the any PW, try and shoot as many bullets off as you can, draining the weapons ammo and decreasing the betrayers fun 
run them over with a vehicle, preferably a ghost, after they get shot by an enemy. That way you dont get credit for a betrayal, but they still die 
Another time on ragnarok a week ago, guy got in mantis and blew up a ghost a teammate was in for no reason. So I in my banshee blew up his mantis which at the same time caused my banshee to explode. He then followed me for the next minute or two until I left.
Ignore it as best you can and hope karma bites him in the -Yoink-.
Ignore them and play the game, that’s the best way to “get back at them”.
harrass them in-game and send bad bad bad feedback
> Ignore, avoid and move on.
This. ^^^
Honestly, trying to get back at them in-game just isn’t worth it. Odds are, the person will probably just try kill you again if harassed. On top of that, you’ll look bad in front of your team and betraying isn’t going to help your stats.
To bad there’s no (PICK ALL) button 
If I cam work out who it is I send them an abusive message.If they are betraying a vehicle I drive till it blows up.I would rather lose a life then see the griefer rewarded for their behaviour.
i find myself always wishing i could come back and assassinate them