Did your parents know or did you have to hide it from them?
Did they prefer you drank/smoked/took drugs indoors so they could be there if you needed them/supervise you or did they forbid you from doing this under their roof?
Did your friends also smoke/drink/take drugs at your house, or did you go to your friends houses?
How long did you drink/smoke/take drugs for?
AIBU to think that if you allow a teenager to do something in your house, with your full knowledge, to keep them safe, then this has no bearing on how many years they will smoke/drink/take drugs for?
YABU Teenagers who are permitted to smoke/drink/take drugs while living at home, in the full knowledge of their parents are probably still going to be smoking/drinking/taking drugs years later.
YANBU Teenagers who are permitted to smoke/drink/take drugs with their parents knowledge are not more likely to develop a regular habit or continue smoking/drinking/drug taking for years.