When I started work for an insurance company in 1986 people were still allowed to smoke at their desk at certain times. I used to find customers files with burnt paper in them.
This only ended when the building was refurbished - they didn't want the ceilings going yellow again!
It was made clear to me when I was very young that smoking was very bad for you and would kill you. When I was 5, I picked up a cigarette butt and some older kids told me I would now die of cancer. Banning smoking in public places has been great though - all of my friends quit. When I see people smoking now it seems so old fashioned - my next door neighbours smoke and whenever they take any packages in for me they absolutely reek when they give them to me.