Hard drugs are illegal, yet facilities to use clean needles are available for addicts. You are more likely to be mugged/burgled/assaulted by a drug addict than any other member of society. Tobacco is sold legally. My generation was positively encouraged to smoke by allowing TV advertising for so long. The (disputed) link between passive smoking and cancer does not worry as many people as the fear of being mugged/burgled by an addict or assaulted by a drunken yob.