It's not at all clear that he's violating any laws. There is no infringement in providing access in a good-faith belief that the content is legit. And it's a fair assumption that the people actually publishing the music files on their websites wouldn't be doing so without authorization from the rights holders. Further, downloading in general (as opposed to publishing) is expressly legal in some countries (e.g., reportedly Germany).

RIAA's best argument would be "contributory infringement", but findings of CI have succeeded only when the actors had some reason to think the files in question were published without authorization. Further, the RIAA offers no evidence for its claim that many of the files were unauthorized, and its implication that you have some way of knowing their licensing status is pure fantasy or lies.

So, I disagree with the "give up, it's illegal" assessment.

The real problem here is that success in civil litigation is directly related to wealth, such that we have a two-tier court system which is a travesty of justice for the have-nots and an unregulated weapon for the "haves". So yes, you have to capitulate, but not for the reason the above poster suggests.