Whilst you are probably right,
I have noted that throughout my working life, that addicts being addicts, generally just take the piss, and regardless of what is said by management,will smoke for as long and as often as they like, and especially if one of the managers is an addict as well.
Maybe non-smokers should just get an extra day off once a fortnight.
(M61A1 CUPID- STUNTS, Wed 28 Sep 2011, 15:26, 2 replies)

Average of
10 mins per break, 3 breaks per day = 2.5hrs per week. Leave at 3pm on a Friday? Yes please!
(ThatNiceMan thought he was being funny, Wed 28 Sep 2011, 17:09, closed)

3 breaks a day????????
where I work most of them would take at least 10 minutes an hour.
The smokers are always the last in, by about 5 min, then duck off again after our "team brief", squeeze another 2 between starting and smoko. Then usually a pre-smoko , a couple during smoko, a post smoko, then repeat this between smoko & lunch, then lunch & home time. As well, 1 will go, ask his mates if they're going too, as he's finishing another will show up, so they all have another with them, sometimes 20 min at a time. Depending on which smoker I use, I'm reckoning about 1-1.5 hrs a day.
(M61A1 CUPID- STUNTS, Thu 29 Sep 2011, 1:50, closed)

Don't forget
They'll probably die earlier too, so they won't do as much work, an extra weeks holiday should even it out!
(anonymousreality tickled your fancy on, Thu 29 Sep 2011, 0:02, closed)