Anyway the best way to make cav join torben move is to kill my old friends' horsies at the beggining of each round.
Nevertheless, the best is certainly when a friendly cav come and bump you during a fight (and because and it's a non-skilled player, he didn't manage to kill the guy you fought) is to kill his horse when he ll try again (yes, because when the almost kill you with the first bump but don't manage to kill the ennemie, the my old friendgie cav come back and bump you a second time) you just kill his horse.
After that, he will ask you why you killed his horse (and him at the same time), say some of the most stupid excuses that you can imagine, and wait for his reaction !
Seriously, just help yourself, when such a situation happen, we should respond in consequence and not wait for the guy to become a non-greedy-stupid player. Avenge yourself (discretly because those stupid players are never punished, but you will if you want to avenge yourself in front of everyone). Here is the solution !!!
In other words, the only way to make those poeple respecting others players is to make them understand that their actions can be punished.
Remember, when you re fighting an ennemie, you can do whatever you want, including killing a greedy teammate !