Are you getting caught by Cops??

From the past few months cops from Wagle Estate are catching people who are smoking near Teen Hath Naka i.e on the service road near Sai Maa hotel and at Eternity Mall ..i.e where the food stalls are. My question is what is price of the fine and ...are they allowed to do that??? If yes, then why aren't people who chew tobacco/paan/gutka aren't fined too. The cops say it's due to smoking in a public space. So if I am out is there a place where I can smoke...coz then the whole of outside is a public space, but then people who chew tobacco/paan/gutka are allowed. What is this?? What kind of stupidity is this???