Just so it is -extremely- clear, you should never, ever, ever respawn from a PvP death unless you have explicit permission to do so from a DM. If you are aware of someone respawning from PvP, please contact a DM so it can be addressed. If you are unhappy with a PvP death or believe the FD was illegitimate, feel free to contact a DM.
"Accidental FDs" (such as someone having the wrong damage type in a spar, etc.) are a possible exception to this rule, but even those I prefer to have handled by a DM or considered an IC accident when possible.