The parallel between social media & smoking is gaining traction due to:
the similarity of usage level to harm caused (albeit of different sorts);
the role of business groups in trying to undermine regulation;
the move to regulate use based on age.
But unlike cigarettes the age-regulation of social media brings with it much higher levels of surveillance (to prove age online) for the rest of the population.... and here the metaphor radically breaks down!
#SocialMedia
https://www.bbc.co.uk/news/articles/c5y7r9gqp6jo