Is there a reason why all non-setuid/setgid are owned by bin ?

For one, "bin" tends to be an account which is never logged into,
and rarely su'd to.  cronjobs...?

In the interest of security (NFS being one concern which springs to
mind), I would have thought that it would be better if everything
was owned by root as it is possible to `control' who is root over
NFS, but not any other uid (?).  I do notice that all dirs are owned
by root, however.

Any comments on whether it should/shouldn't be changed for the future ?

darren