Two words, right out of Orwellian Science Fiction and into our legislatures folks, Pre-Crime. You are innocent until proven guilty in this country,
that's a freaking joke now.
Funny, you can buy all the Ephedra viridis plants you like, but god forbid you buy two boxes of cold medicene.
IMO, this isn't about preventing the manufacture of meth to begin with, it's about eliminating the competition for narcocorruption. If people are
making cheap illegal amphetamines, they aren't spending as much on the CIA's heroin and cocaine, and they loose their black market funding for all
their nasty little projects. The war on drugs is the biggest protection racket/money laundering scheme in history, ask the contras.