Individuals have the right to do as they please as long as they don't harm or injure others. Third parties do not have the right to poison and kill individuals. Poisoning and killing others violates rights to security of the person as well as numerous sections of the Canadian Criminal Code. Tobacco companies poison and kill thousands of Canadians every year. By providing the poison that kills thousands of Canadians every year, tobacco companies are directly responsible for the deaths their products cause.
Tobacco companies are guilty of murder.
Tobacco companies provide the poison but claim that individuals, in choosing to smoke, are consenting to being ki lled. This is a dubious argument. There is public debate whether euthanasia and mercy killing are lawful. If they are, then tobacco companies can extend this to say that all killing by consent is not illegal. Canadian law, however, does not support this.