People are a little overprotective about flashing. Its not the high risk operation that you think it is. Every board has to be flashed/programmed initially to put the data onto the empty EEPROM. As long as you use a rom that you dumped yourself and use only the standard nvflash syntax (i.e. nvflash [romname].rom) the risk is pretty much non-existant.
urban myths pete my bud.
only if you are flashing and pull the card out of socket..
maybe... only maybe there will be a problem