Do you think that I am right if I'm going to ban alcohol in my house?
Why are you doing that?
I don't want to have any kind of drugs in my house.
It is fine. It is your house, so you can make the rules for it.
It's my house, my rules.
People may not agree with your rules and won't want to visit you if they want a drink. As long as you are ok with that, then your rules are fine.