Do you think a police officer would really risk his livelihood to attempt this sort of thing?
Think about all of the illegal steps an officer would need to take - from procuring the drugs to falsifying the documents (narrative, etc.) - just to "punish" you.
Drug possession. Drugs they found in your car after a "random" stop. I Whether you never use drugs or not doesn't matter, they will find something.
If you think cops have to play it fair if they wanna punish you, you are a bit naive.