Nothing I stated made any sort of judgement about whether or not something should or should not be advertised. The original statement (quoted in my previous response) was that someone opposed to an advertisement was "not allowed" to oppose that promotion.
Quite frankly, nobody should be in charge of regulating the messaging. That sounds like top-down control which does nothing but solidify the positions of people/organizations that are already in power and can afford to lobby for such regulations. It's often known as regulatory capture.
There are clearly groups of people that "oppose harmful things" (which is quite vague, but I digress), and have carved out parts of the market that agree with them (e.g., organic foods) and are quite profitable.