I think its a rather interesting idea, but would cause too many problems. It would either require so many limitations that it becomes useless, and still remains a big potential problem, or is simply far to overpowered.
I could easily just leave a .223 pistol lying on the ground with some armor and ammo near an unguarded base, as if i had died there. Someone comes along, picks the stuff up and move along, mining and then presumably going back to his base. I simply follow him there, kill him, and loot the base.
I love the idea, and it if involved with the traps skill it would be cool, but there are simply too many problems/abuses that would come with it.