port deactivate suggestion

[Ryan Stonecipher]

The 'port deactivate' command prevents deactivation of ports with
installed dependents:
    Error: port deactivate failed: Please uninstall the ports that
depend on [foo] first.
Might it be better to prevent deactivation of ports with active dependents?
An error such as the following would keep active ports from depending
upon deactivated libraries but would not mandate uninstallation (and
thus rebuilding) of ports which could easily be deactivated then
reactivated:
    Error: port deactivate failed: Please deactivate the ports that
depend on [foo] first.

Ryan Stonecipher