Copyright law does allow for some legal reproductions: See section 107 of the copyright law.
"Section 107 contains a list of the various purposes for which the reproduction of a particular work may be considered fair, such as criticism, comment, news reporting, teaching, scholarship, and research."
Modifying licensed designs to resell or giveaway does not appear to fall within the legal guidelines so I would agree that staying way from downloading or purchasing such is a good idea.