no it shouldn't be illegal. And to compare the advertising of formula with advertising of cigarettes is, quite frankly, insulting to any mother who ff her baby either through choice or necessity.
And imo it's a slippery slope, ban the advertising of formula and before too long the evangelical bf brigade will be campaigning for formula to be banned altogether except in the event of medical necessity.
There are people out there who genuinely believe that every woman could and should breastfeed, and those who believe that formula feeding is tantamount to child abuce.
People have the ability to choose. so if you ban the promotion of formula then imo you should also ban the promotion of bf and let people make up their own minds by doing their own research.