stuff like this seems to be the standard for most outdoor sporting events. I don't smoke, but it typically doesn't bother me...although the flicking of lighters during my release on tee shots isn't as rare of an occurrence as it probably should be.
on one hand, disc golf is an outdoor activity, and it's hard enough for smokers to find a spot to actually smoke, on the other hand, it would be courteous if there was no cig/other smoke to deal with when I'm playing. You know, outside, fresh air, etc....
this reminds me of something funny one of my friends said to me after a round. she was complaining that it's lonely being the only smoker in a group - I turned that around saying that it's much more unpleasant being the only NON-smoker in a group.