Others are under no obligation to give you back a copy of software you've written, in source or binary form, just because you were so careless as to misplace it or the means of compiling it. Others are under no obligation to make it easy for you to duplicate /their/ work in developing extensions to your software.
While there are many ways to define "harm", the justifiable responses to "harm" are restricted to those proportional to the offense. Even if one granted that "embrace-and-extend" harms the original author of the software, injunctions, fines, and the like are well outside the limits of proportional response.
Copyright © 2017, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds