in the old time the information exchange was too expensive for individuals living in different mountains. but now we have the internet.
many authors upload their paper on the internet or give out if you request, they are also happy to discuss about it.
We do know how to get rid of them (cf. https://archive.org/stream/GuerillaOpenAccessManifesto/Goamj...):
"There is no justice in following unjust laws. It's time to come into the light and, in the grand tradition of civil disobedience, declare our opposition to this private theft of public culture.
We need to take information, wherever it is stored, make our copies and share them with the world. We need to take stuff that's out of copyright and add it to the archive. We need to buy secret databases and put them on the Web. We need to download scientific journals and upload them to file sharing networks. We need to fight for Guerilla Open Access.
With enough of us, around the world, we'll not just send a strong message opposing the privatization of knowledge — we'll make it a thing of the past. Will you join us? "
this is what libgen, sci-hub are doing but they are struggling, they change domain name often these days maybe due to legal matters with publishers.
i still think that libgen and sci-hub will prevail, like thepiratebay and kickass. the community supporting and needing them is real and "we dont need permission to do the right thing".
edit: sorry but i dont why my above comment is downvoted, is it too naive or negative in some sense?