I think it is lame to self kill for any reason during a battle. Getting poisoned is part of the game and part of real warfare. It is no different (lamer) than expecting a kill from splash damage from a panzer.
The mechanic for this (once your poisoned) is to call out for a medic to give you a pack or find a med rack. Other than that, just run around and try to kill what you can and then die...