Is OTHER wrong in the post ? POST : As context I am 19 years old M, my younger brother is 16 years old. He is in high school and I am in university. We both live at home with our strict black parents. We both live in Canada where the age to drink/smoke weed is 19. Some of this info may be unnecessary, but I am not really sure what kind of context you guys need to make your judgement.   

My parents are leaving for a week on vacation and leaving me and my brother at home alone. He wants to have his friends over and smoke/drink while they are gone.

I don't want him to do this for multiple reasons. Firstly I don't want him to do this as him and his friends are all minors and I am the only adult there so if somehow the cops show up (I know unlikely) I will most likely get in a lot of trouble. Secondly I don't like the idea of lying to my parents as they are trusting me to make sure this kind of stuff does not happen. My parents and I have a pretty good relationship and I know if I let him do this and they found out they would never trust me. Lastly I don't want any of his friends to break stuff in our house or the neighbours asking my parents why people are coming over and have to worry about making up some lie to cover up (I guess this is the same as not wanting to lie).

He is saying that them coming over has no effect on me (which is kind of true) and that I am being a party pooper. I don't mind if he smokes/drinks at his friends but I don't feel comfortable with him doing this at our house.

I choose not to smoke/drink (if that is relevent) but I don't care if others do. My main problem is with it happening at our house. Regardless I will get final say as to whether this happens or not, as if I tell him not to have them over he won't, but he might keep his plans to himself in the future (which is fine I guess).

So am AITA with a stick up his ass or are my reasons for wanting my brother to not have his friends over reasonable.