Use the /ignore command. Ostracize that "roleplayer" until he or she decides to stick to some common sense rules.
I don't know much about the /ignore command but, how can you tell if a person is acting normal if you're ignoring him?
Under current rules we can do nothing to stop godmodding all I can suggest is you make it clear OOCly that you consider it so and avoid continued rp with the person/s involved.
I agree, the day before yesterday (if I'm correct), I walk to a group of people outside Kada's I greet Dallara (I didn't know that there were two 'demons among the group, with power of 'sucking evil and energy out of someone, another one was coughing up blood)
Afters Socks asked what was going on [he was kinda worried about the blood coughing] Then out of nowhere Dallara and Socks are grabbed by their throats and their energie was being sucked out...

I was like WTF? in OOC but they kept going... Socks tried to challenge on of them [Cause hey, I just think that sucking energy out isn't that a good Idea] Then I get the OOC response that it is an RP to kill someone else and I just SHOULD play along

well we kinda fled we both didn't know crap what was going on
Then suddenly

Server crash ^^ A nice way to get on with an alt and don't mind them any more
From that day on, I gave Socks the ability to tilts his head and walk around things neither him or me can understand
