Affiliate Marketing Secrets

I’ve been caught up in the trolling efforts of a well-known firm that pursues possible pirates of pornographic films. I’m innocent, I’ve never even heard of the film and I don’t participate in piracy. I’m willing to offer my computer to be searched to clear my name, though they’re pressing for a settlement of a few thousand dollars before they publicly name me as a defendant (one of those ‘John Doe’ situations). Seeing as the best evidence they have is an IP address that was somehow affiliated with my internet account, do I even need to hire a lawyer for this?

If porn tube sites host large portions of copyrighted content, can a user get in trouble for downloading?
With piracy being beaten down for the last few years, and more recently, the porno industry…are these tube sites actually safe? For example, can someone affiliated with the copyright holder legally throw up a bait file as is commonly done with other protocols? I mean…usually its only at most a full scene from a movie. Does that constitute a copyright violation?