What happened to All Liberal, All the Time BRTD?
Restricting tobacco is liberal. All the first states to implement indoor smoking bans are liberal.
So, I guess, you are also all for continuing prohibition of marijuana?
Prohibition is an illiberal policy, by definition. Even if that is the one illiberalism many liberals allow themselves.
Note: you could reasonably argue for certain restrictions on indore smoking in public places, because of the externality imposed on others - you will be ballancing the interests of different people, and, up to a point, some restrictions may be reasonable. But once you progress beyond what is essential for the health of those who would be involuntarily exposed, you stop being a liberal, no matter what you think of yourself.
Full disclosure: I am a life-long non-smoker.