Isn't eMule a peer-to-peer filesharing program? Do you actually believe that people developing programs for the sole purpose of distributing digital copies of copyrighted (+ proprietary) computer software, music and movies, are going to care much about copyright and the GPL? The strength of the GPL comes directly from copyright law, you know.

Yeah, eMule obviously can be used for distribution of legal GPL/open source/freeware software too, but - come on - that's not what it mainly is used for.