port installs: /usr/X11R6/bin versus /usr/local/bin ?

[Rob]

Hi,

Why do I have, for example, /usr/local/bin/netscape and /usr/X11R6/bin/mozilla ?

Applications from ports are randomly distributed over these two directories, which
I believe, is a bad strategy.

I can figure that exclusively the XFree86 ports may put files in /usr/X11R6, but that
should not allow other ports to add files into the same directory.

Why is there no stricter policy on port installs to put files only in /usr/local ?

Regards,
Rob.