I can already see trolls that will make themselves teamkilled on purpose

Good point. It's a first step though. We still need to turn the 'hold E to forgive' into 'hold E to punish', though. That way you'll know someone made the consious decision to punish you, making it easier to find TK-trolls in the process. By TK-trolls I mean people that jump into your fire or in front of your vehicle repeatedly with the sole purpose of getting you kicked.

+1 to that.
"Hold E for Judgement" or something like that

Oh daaamn, I like the sound of that! Maybe make it faction related too, like 'REPENT, MOTHERF**KER!' for LSM. Or something a bit more serious, ofcourse

"Hold E for Judgement" - LSM
"Hold E to curse his soul" - CSM
"Zog dat git wiff E" - Orks
"Punish the misguided with E" - Eldar?

And that's how you get Slaanesh

meh that's how u get players of all factions to press "E":
"Press "E" to bang banshee-butt."

Making it illegal makes it so much more sexy.