I think the assumption is made that you did not learn once, did not learn twice, and after the third time you just figured out how to not get caught.
After all,
No One is going to believe that you got caught the only three times you were in possession of controlled substances.
But here's a thought:
Contact an attorney. Ask about expungment laws in your state. If you are luck - REALLY lucky! - you will find out that after a certain amount of time the record can be expunged (that means erased) and you may answer "no" to all "have you ever......." questions. As you point out, these are misdemeanor charges and usually they can be expunged, especially after a period of years with no further violations.
BOL....really, BOL!