Having worked with druggies (heroin),stoners.and alky's - if you show up on my job site "under the influence" - one, or both, of us will soon be job hunting.
I've spent much of my life working in somewhat hazardous conditions, and won't accept the additional danger of an impaired co-worker.

I've always been a curmudgeon - now I'm an old curmudgeon.
~Molɔ̀ːn Labé Skýla~