I am sure though that we have run into the scenario where we have thought that we no longer need that file and we put it in the the Trash. The whole purpose of the .Trash (even Recycle Bin on Windows) is really a "safety net" since it allows us to go back and restore that file later if we realize that we made a mistake and actually do still need the file.
I know by default that Time Machine does not backup the .Trash folder. So is there a way to force it to include this hidden folder?