I think sometimes people misread parents, and siblings, they probably only wanted to protect you the way all parents do, believe me if anyone knew what you were up to it was your father your eyes alone would be the giveaway, no mistaking those signs, and of course there would be no smell of beer, plus a smell of tobacco/hash, believe me as a non smoker you can tell immediately. So I'm guessing, but probably right, that your father used basic psychology, screaming at teenagers makes them do it again so he took a different route. Go back and analyze what you remember, it's your talent, and look at it as an outsider would look at it, I'm sure I'm correct, your parents knew all right but tried correction not punishment.