I haven't run into that that I know of yet. I do know that my company makes it very difficult for us smokers.Just like some company's will not hire you if they know you smoke cigarettes.
One observation is that when a company is small thier policies on everything from guns to smoking are usually more relaxed. The more the company grows, the stricter the policies can get.
When I started my job there were only 200 employees. Things were a lot looser. As we grew that changed. things that were tolorated 2 years ago are grounds for instant, no questions asked escort you off the grounds termination today.
While we were small more than half of the employees were shooters. Now that we have over 700 people including an office in New Jersey that percentage has drastically dropped.
At both points in our history firearms on property was instant termination.