To me this is ridiculous. I remember players sitting on the bench spitting brown goo all over the place, and it was part of the game.
I play softball, and it's not unusual to see several players spittin' brown during the game. There's a reason pro ballplayers dip/chew, it doesn't harm your lungs and doesn't impede breathing.
Tobacco is a stimulant, and if you're addicted to it, it's a necessity. There's no reason to ban it if you aren't harming other people's lungs with smoke.