Callous indifference can be just as bad as malice.

I'm reminded of these t-shirts with "Keep Calm And..." slogans that were allegedly generated automatically (presumably culled from web searches) and sold on Amazon without human intervention: http://www.bbc.co.uk/news/business-21640347

I think the lesson is, if your business model MUST involve pulling stuff from the Internet arbitrarily, it is no less your responsibility as if you had crafted it yourself if you intend to commercially repurpose it.