I feel that smokers should not be allowed to smoke while walking, even in open air areas. It is really terrible as others cannot avoid the smoke, especially when walking in the same direction. Other people are forced to overtake the smoker or are forced to inhale the 2nd hand smoke trailing behind the smoker. Either way, this is an inconvenience to others.
So smokers, please refrain from smoking while walking and just stick to the designated areas.