PhillyDog - The non-smoking policy for Majors has to do with whether a sport's ruling body can make rules regarding how the sport is played in sanctioned competition, regardless of the reason for the rule, whether it makes sense, is stupid or ill-advised in some players' opinions. Unless the rule requires players to do something illegal in that municipality, a sport does have the right to restrict even legal behaviors as specified in their rules.
For example, even though we have the constitutional right for freedom of speech, disc golf has a warning/penalty for speaking at the time another player is making their throw. No one is likely to take that temporary restriction in disc or ball golf regarding freedom of speech to court.
There's no written constitutional right to smoke. However, wafting second hand smoke on other people is apparently covered under battery laws in some states from what I understand and that's been upheld when tested. If any suit might be filed, it could potentially be a player suing another player for exposure to their second hand smoke and the PDGA could even be included for not having a rule against it.
I'm a non-smoker and appreciate the new restriction as a player. However, had I been on the Board, I'm not sure which way I would have voted. Fortunately, I didn't have to. To me, using the blanket Throw & Distance penalty at a Major (USDGC) is a much bigger rule issue that I would vote against for the future.
Rater of the tossed arc.