> However, if distribution D includes this "easier way to install" in
    > its ports system, by doing so distribution D endorses it and takes on
    > the ethical responsibility for it.

    Using the same argument I can say that gcc isn't ethical because it allows 
    compilation of non-free software.

That isn't the same argument, or even the same issue.

You are talking about what the user can do.
I'm talking about something else: what the system distro suggests
that the user do.