If a drug dealer's stash is small enough to be disposed of by flushing down a toilet, he's not worthy a player for a no-knock raid in the first place. The guy is small-time.
There's two kinds of drug dealers. Those who need forklifts and those who don't.
“If a drug dealer’s stash is small enough to be disposed of by flushing down a toilet...”
I know of a case that local LEO’s actually destroyed the DWV system of a home to recover drugs that had been flushed.