I selected #1, but then I'm a very trusting person - and I've never had anything stolen.
I drop my full pack beside the trail to hike a side trail, and I've handed my car keys over to someone I chatted with on the trail, then as I was walking off, said "hey, what's your name anyway!" (we are good friends to this day, and still laugh about it)
Another time a friend of mine put the kibosh on a key swap with strangers on Doubletop - they were doing an up and over with the idea that it was a 2 mile road walk back to Kidney Pond. I told them it was more like 10 miles, but I had yet to do the hike up and over and was excited at the prospect...
As we were discussing the key swap (I think they had theirs with them, mine were hanging in the lean-to) my friend kept saying kinda under her breath "but my pocketbook is in the car"
bewildered, I replied, "well, they can put it in the back"
LOL...finally she stood in front of me and got her message across, I ended up driving them back to Kidney Pond. Funny thing is, they had a Mercedes...