I'm going to go against an airbnb host's wishes and smoke in their room.
Why would you want to go against their wishes by smoking?
I think it's silly. I should be able to smoke if I want.
It's not nice to go against your host's wishes. You should always honor your arrangements.
I'll do whatever I want to.
If you smoke in their room I'm sure they'll find out because they'll be able to smell it, and then they might report you to airbnb. I think if you want to smoke then you should go outside, and not break your agreement with your host.