In the corporate world, it's called "project creep"..once they ban smokers, they can ban fat people on the basis that they already ban smokers for health reasons..once smokers and fat people, they go after the next group, whoever that may be..and on and on and on..
This is the primary reason I refuse, under any circumstances, to use those "discount cards" at the grocery store..much as they say they don't, I believe a record of what is being purchased per card is being kept..based on this article, what's to prevent a possible future employer from obtaining this list, then determining they won't hire me based on what I buy because they don't deem it healthy?
That's why the "Where does it stop" come from..
I'm torn on the subject. On one hand, I abhor being around smoke. I avoid it at all costs, because I'm so allergic. Being fat, etc., does not really affect others on the job, but the smoke in the air I breathe does.
And, I've noticed that smokers get "breaks" on the job to smoke while the rest of us plug away and work.
That said, I dislike this kind of selection. But trust me on this, selection does happen on many levels, but it's not spoken about except behind closed doors.