Re: Hookup classifieds ad sheet Backpage.com seized in Feds shutdown
"… covered by the same US law that Twitter, Youtube and Facebook use about not being responsible for user generated content."
They all became responsible for the content when they implemented filters/algorithm/fatwas/proscriptions/etc. on content. Laissez-faire -- acting as a purely neutral conduit -- is what gets them free and clear of responsibility for the content of the pipe.