And of course it may be that a destruct by external forces can be a "Destruct Zero" on occasion, a "Destruct One" on another. The default setting on any Federation starship would probably be "in case of destruction, eject all antimatter for minimizing the effects". Which would explain how the very concept of starship wreckage can exist in the Star Trek universe; without "Destruct Zero" type precautions, the vicinity of Wolf 359 should have been a gaseous anomaly rather than a scrap yard.
Timo Saloniemi