This. I think that would be awesome! To have to defend the stuff your rightfully "found" first! I think that would be an awesome random public group/quest event. Alternatively, you could get a quest to loot another city of the rival faction and they would have to defend the city. A kind of PvP if you will. Not just killing to defend or attack, but acquiring items from the town and/or re-acquiring all the items taken. Something along those lines. It is a planet basically up for grabs, why not fight for what you, or others, find?