that is very untrue. as long as you/they have root access, the permissions/ownerships can be changed to their respective persons. there is a solution to every problem; especially in linux. there is always a way out. in this case, it is a very easy, two minute change. i'm guessing they are just too lazy to make the changes and lookup the proper username to set ownership to, or are too lazy to change permissions.
hope i could help!!!!!!!!!!