acctualy i was thinking about this myself since i use some mods weapons and all (includin the m1), but if im not wrong, u can probably make a list of unremovable items, or maybe make the script add the lost items to the npc that killed you and make him somewhat of a named special npc (i dunno but it would probly be a pain in the ass to make such thing). At any rate if a lootable list is added to the main script using only vanilla and none named items (such as maria or this machine) i think there would be no problem, as for the chems and food, its not like they're scarse (obsidian made sure of it), and acctualy makes you more human and less god, since you're stuff arent permanet and offtenly in real life you loose stuff and then you have to replace them, i particulary think it would add something else to do in the FNV world since in 4hrs gameplay u can have 60 stimpacks, a hunting rifle with 204 ammo and 10000 caps,....and also it would force you to explore the world a bit more, looking for food, hems and all those goodies. And about the deathclaw i dont think he would try to loot you,...he would just kill you instead...=P I believe that deathclaw would eat you with everything you have in your invisible backpack.