Is it possible to blacklist a package and its reverse dependencies?

[Ottavio Caruso <ottavio2006-usenet2012%yahoo.com@localhost>]

Hi,

I put this in my mk.conf:

PKG_DEFAULT_OPTIONS= -dbus

but pkgsrc will still build and install dbus if it's listed as dependency.

I'd like to understand the logic behind this pkgsrc behaviour.

Thanks.

-- 
Ottavio Caruso