I touched on this in an earlier thread
. To Reiterate:
Force closing a client in order to avoid a death in PvP is clearly an exploit of in-game mechanics and violates our Terms of service:
7. User Conduct
(n) Take any action that may prohibit other users from enjoying the services of the Website or games.
If you have evidence of a player force closing their client in PvP and thus avoiding a death in PvP, please submit that evidence via Contact Us