From this point onward, if you want to conduct planned PvP against another player in a faction area in which you're a member of -- you must (must, as in OOC must) have permission from a DM.
We're trying to avoid two kinds of situations:
(1) Characters being locked within areas where the doors are marked plot and are thus unable to escape. (2) High-powered NPCs tipping the scales of a PvP situation
Those factions with arrest powers may of course arrest people, and when we have PC Councilmembers they'll be able to try (and execute) as well.
Note: No single situation motivated this post
Let us know if you have any questions.