Just over a year ago in the UK there was a law passed against smoking in public places.
It didn't cover outdoor venues though, but the place in the article below will have areas where smoking will be banned.
For example, if an "building/shelter" has a roof, if it is more than 50% enclosed it becomes illegal to smoke in it. So most bus shelters are non-smoking.
Anyway, I think the smokers in the story below acted to the extreme.