Honestly, Two Worlds probably has one of the worst examples of multiplayer options being tacked on. Several skills (such as swordbreaking) became horribly broken (no pun intended) because they allowed higher level characters to cripple new players. No join controls (that I remember) to protect newbies from being griefed. The multiplayer maps were just copy pastes from the single player campaign without the story, and too small for any meaningful exploration. There were no horses, so the one skill that's completely worthless in the single player game is still useless (Unhorse (there's no mounted enemies in SP either)).
If it had been multiplayer in the full environment, then it would be forgivable, but, as is...
EDIT: Disarm was probably worse for griefing, as players would disarm someone and then steal their weapon and log off.