> 
> 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.

The bin user is the historical owner of binaries, I'm not exactly sure
why.
  
> Any comments on whether it should/shouldn't be changed for the future ?

I do exactly this, you can do the same.  Just set BINOWN in bsd.own.mk.
By default LIBOWN inherits from this as well, so your libraries end up root.
--
Mark