http://www.davidco.com/blogs/david/archives/2005/04/good_coaching_f.html
Not sure where an "Open Source Software" fits into the IP legalities, but some snippets to help qwell any bad vibes…
DA: … We had people starting to use GTD in ads, promoting their own stuff, and our attorney said we've got to step into this or it would really get out of hand.
Merlin: …It would be valuable for you to clarify the advice you've received to issue C&Ds–that these are essentially going out to folks who are deliberately lying about a relationship with Davidco or who are implying non-existent licensing relationships, or what have you.
Merlin: …It would be an awful shame for any of that valuable web karma to be
damaged by an unnecessary misunderstanding, you know?
DA: …I take your coaching to heart, and will post haste work with my attorney to draft something of an "official" document for the community.