Comment: Just to be clear, I wouldn't

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In reply to comment: But my point is, the effect (see in situ)

Just to be clear, I wouldn't

Just to be clear, I wouldn't hire a tobacco smoker either.

And the experiences with other employees "sneaking" all happened when I was just another employee, so I cannot be "blamed" for their lack of good judgement. I know first hand the kind of stuff that goes on at the employee level when the "bosses" aren't looking, so it's better to just not allow trouble in the front door rather than allow it in and be a problem later.