Signals intelligence agencies have to deal with enough data as it is. They don't have the resources to care about piracy or even the vast majority of drug offenses.
You know this because? Once stored it can be farmed to anyone with a mapreduce job to spare. Esp when the investigating agency can take some of the bounty, law enforcement can be a nice profit center.
Valid point. We don't know if they're doing that (and I suspect it's probably illegal) on a wide scale (the parallel construction cases appear to be specific help requests made by the FBI/DEA to intelligence agencies), but they certainly could in the future if they're not already.
