The weird thing is, I never really see people smoking. The park has designated areas, but I just don't see many of them? Frankly as long as they are not blowing it in people's faces, it is there choice.
The only smoking spot I think that should be moved is the Condor Flats one in DCA, or maybe it was the day I went. It was fairly crowded and windy, and a cloud of smoke just sorta blew around.