automatically removing dependencies with packages?

[Ray Kohler <ataraxia@cox.net>]

Is there a way to automatically remove all dependencies of a package 
(that aren't otherwise needed)? If I install a big package with dozens 
of dependencies and I decide I don't want it, I don't like to root out 
all of its dependencies by hand. I could do this on FreeBSD using 
'pkg_delete -R'. Any equivalent here?

-@