This is more than a second hand smoke issue, though it is second hand smoke that most people are visibly irritated with.  This has become an issue with bureaucrats who want to create a healthier public so that their bill for socialized health care is less expensive.  Bureaucrats all have their own little pet projects.

More restrictive smoking laws are in our near future regardless of how contrary they are to the principles of freedom.  So are restrictions on sugary drinks, candy, foods high in fat, foods that promote animal flatulence, foods whose production might cause fertilizer run-off, need pesticides, or would be transported great distances for consumption.  (For the Daniel Quinn fans out there, restrictions on any and all mass agriculture would be a good thing.)

Most people will sit back and accept this particular anti-smoking encroachment into their own personal lives because they happen to detest smoking and therefore surrender little measurable freedom due to its enactment.