Sorry if I missed a discussion on this already - I used the search function but I couldn’t find anything on it. Also, apologies if I’m wrong about trunks not having items in them.
My two thoughts on them are that it makes sense for some to already have items left in them by previous owners and that they should be (e)xaminable, as currently the system for getting stuff in/out of them is a bit strange.
Obviously one of the problems with this is that it’ll mean a lot more searchable places/encourage checking lots of cars, but it could be that many are damaged or open (if this had a different symbol, it’d make it easier for players to see from a distance)