How much do charity back packers stress you out?
Me? A LOT.
I'm no OCD loon but I like my bags packed as efficiently as possible - ESPECIALLY when I have taken the trouble to bring a bunch of bag for life bags. YOU my young friend do not possess my many many years of bag packing experience so BACK OFF.
I usually go along with it like and give them a quid.
Oh and Any Other Business of course.