Do Tobacco companies have a duty to care towards smokers?

The Australian Government is being urged to use tobacco companies by health experts according to an ABC report. The percentage of Australian smoking has reduced ever since Australia adopted the plain packaging policy. Dr. Ross MacKenzie from Macquarie University believes that the next phase in trying to control smoking in Australia. Even though the smoking rates have dropped sharply, on top of mounting health care coast and social coast. Smoking still kills over 15,000 people every year. The full articles can be located here 

Question

Do Tobacco companies have a duty to care towards smokers?