I tend to think of, and use, collection objects like symbolic links in the UNIX world. When I delete a symbolic link in UNIX the link is removed but the file it points to remains. Not so with collections and I have to right click on selections and choose "remove from collection" to achieve the same.
Could we please have an option in Dopus to alter the beahviour of collection object deletions so that they are only removed from the collection? In such a case the context menu could be altered to include an option to delete the files, effectively switching the roles of the default deletion behaviour and the context menu alternative.