https://en.wikipedia.org/wiki/Red_herring
A red herring is something that misleads or distracts from a relevant or important question.
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The teacher was arrested for possession of meth.
pickle's response was that:
poor judgment is not a crime (nm)
http://tigerboard.com/boards/view.php?message=16767514
Of course, poor judgment is NOT a crime, and no one asserted that it was. Nor was she arrested for that. It was a diversion from the real issues at hand.
If he wanted to address the question honestly and head on he could have said that possession of drugs should not be a crime... or that she was entrapped.