About the peds using their trunk, I hope you can steal the items they put in it. Like, you see a guy selling weapons, drugs, whatever, you know he's holding his things in the trunk, because you observed him. I don't want to be able to know what people store immediately. So when you know about his items, you take him out, open his trunk, and you'll be able to sell or use his stuff. That would be a nice, and challenging, if R* does it correct, way to get weapons or money, or whatever they've got in there.
Thanks for posting, by the way