You said: Presumably if there were a free market in ISPs, this wouldn't work.
You might have wanted to say "competitive market" or "perfectly competitive market", not "free market". A free market is one in which laissez-faire is the only rule, and monopolists and oligopolists are not a priori bad.
Yes, you're right; the market would merely have to be somewhat competitive, not some ahistorical wet dream of Hayek.
Regardless of whether monopolists and oligopolists are good or bad in general, I was only trying to establish that in the presence of oligopoly, the RIAA's strategy would be very bad, and in the absence thereof, it would be ineffectual.
You might have wanted to say "competitive market" or "perfectly competitive market", not "free market". A free market is one in which laissez-faire is the only rule, and monopolists and oligopolists are not a priori bad.