My feeling is that if your that scared of second hand smoke and catching COVID then don’t go to an amusement park during a pandemic. I don’t smoke but I also don’t believe you should punish them for doing it in an outdoor space or putting said space inconveniently outside the park for a shamming show to ensue. There will be enough shamming in the park every time someone sneezes, coughs, farts, removes mask in a non designated area or excited uncontrollable self or children get too close to other people.
I’m sure more harmful pollutants are released in the air when visiting the park by the massive power plant that powers all your favorite rides than Joe and Jane enjoying a cigarette that everyone likes to point the finger at.