Okay so I've looked at the responses in this thread and most of them seem to be missing the point. The fact that there will always be trolls out to ruin the fun is something I already know and have come to terms with, but I'm pretty sure there's only so much RDMing they can and will be willing to do with a system that actively kills them and makes them wait an entire round 1 victim at a time. Stating blanketly that this won't effect their morale is pretty silly. Nobody wants to sit out and do nothing for entire rounds, not even trolls, the constant uninterrupted activity of trolling is what keeps them around.
And yes, this will effect gullible and or clueless innocents, consider it avoidable by skill.
Or people could just think you're an innocent whom just happened to make the right call and kill a traitor.
"My way of implementing this is probably a mutual penalty system. If a person happens to kill a traitor then he/she gets points and nothing further happens, if however the person they kill happens to be an innocent then a penalty will occur whether it be auto-slay or damage"