Removing a port and dependencies?

[Michael_google gmail_Gersten]

Is there an easy way to remove a port and all of its dependencies that
are not being used by something else?

I can use port-rdeps to find all dependencies, and can force them all
to be removed. That's no longer a problem.

If I try to remove only the not-in-use stuff? Well, then order becomes
important, and the order out of port-rdeps doesn't come out useful.
And all of the "follow dependencies" options are for upgrading only.

Ideas?