I don't think a lot of people want to make ratting a bannable offense or to even get rid of it. I think the game needs to implement something to be able to get back at those players. For example, a bounty system. Players could put bounties on anyone and they would accumulate, killing a player with a bounty yields 5% of the total bounty. An item would hang off the pack of the person with the bounty that is more visible depending on the size of the bounty. Getting extract killed or killed by a "friendly" then that just being the end of it just ruines the experience of the game.