take the chewits facebook page.re chewits aren't paying for advertising, they're just updating their home page, but what about posts like this one? the important thing here is to make sure if you are an advertiser and you are using facebook, as a communicating channel to get through to people, is to make sure that you are not you are not targeting under—16s with your advertising for your products that are high in fat, salt or sugar. and of course also to make sure that you are complying with the tougher content rules for ads, even assuming you're not doing that. chewits told newsnight that the vast majority of people interacting with the chewits page are over 16. there's not much doubt that advertising to children works. a yougov poll, commissioned by cancer research uk, and given to newsnight, found that 11—to—19—year—olds with high ad exposure were almost three times more likely to have diets high in salt, sugar and fats. and where did the survey find that those young people watched those ads? well, on daytime tv,