Will/can you say the same about smokers?
Whether a substance provides anything beyond enjoyment to the user is beside the point. As long as it doesn't cause harm to another it should be up to the owner of the property to allow, or disallow, it's use.
Wouldn't it be interesting to see how many of the smoke nazis own their own business?
It's very easy to take away someone's rights, when you don't have any exposure to the possible taking of rights.