Re: Bug#244289: xball: Package includes non-free source code.
@ 17/04/2004 16:18 : wrote Joerg Jaspert :
Written by Dan Heller. Copyright 1991, O'Reilly && Associates.
This program is freely distributable without licensing fees and
is provided without guarantee or warrantee expressed or implied.
This program is -not- in the public domain.
In my opinion (and some others after a short talk on IRC) is that this
is non-free as it doesnt allow modification. "look but dont touch".
It seems to me you're right. Restricts modification (DFSG#3).