In some countries it is illegal to provide false information to the court, especially so if you're a government agent. How is this "parallel but fake" evidence even legal?
The problem is when they don't disclose properly the worst case scenario (for the government) is just a mistrial or acquittal. In cases where the defense suspects parallel construction, they need to put the officers on the stand and ask them straight out "did you receive any information from a federal government agency about the defendant?". Make them either give it up or perjure themselves.
It can't hurt to ask, if it convinces one cop not to lie its worth it.
Knowing to follow someone down the highway until they make an illegal lane change, because you received intelligence from DEA/NSA electronic surveillance not approved by the courts, is not acceptable to the courts.