Just remember, it's just a courtesy issue. If you wanna be a respectful and honorable person, don't bag jump. If you wanna be an outlaw, go ahead and bag jump.
I personally don't bag jump, and I'll attempt to return someone's DB within a certain length of time. I will ask on several channels if the DB is anyone's, but if I don't get a response within a certain amount of time (at my discretion), then I'll just claim the DB as my own.
There are others who will go to the ends of the earth to return it, but I just gotta remember its fair game once ur loot hits the ground...and I really can't blame anyone who takes my DB if I die, although I will be mad as hell.