Haha, yeah that sucks. My buddy and I have been running around and mostly are coming across extremely cautious but non-hostile players. We even had a trade with 2 other players, our extra can opener for 2 canteens, compass, and 2 or 3 cans of food I dont remember. Of course now other things can be used to open cans (at a cost to losing some of the food) but before that patch can openers were like gold
Anyway, we always go our own way after running into other players exactly for the situation you had! It will be interesting to see how things develop as they keep adding more items to the game.