While it seems likely that there are large scale distributors of pirated CDs, DVDs, and other goods who are also major drug traffickers, it seems unlikely that these same people are the ones selling them one off the the back of a truck or out of the trunk of a car.
The real question is whether the RIAA can convince the prosecutors that they need more authority over copyright offenses that are currently civil affairs. This would include all the cases that the RIAA has brought for file sharing to date. If they can make the connection in the lawyers' minds it may only be a matter of time before the kind of legislation that the entertainment industry has pushed for in the past, where many current civil offenses become criminal matters, becomes a reality.