One dimension of that distinction is intent - are you trying to persuade me having my best interests in mind (including not applying the technique if you're not sure about the consequences)? Then I'll probably be fine with it, and consider it an act of friendship. Are you trying to exploit me by convincing me to make self-harming decisions? I'd consider this an act of malice. An attack.
Advertising of all kinds would be fine if it performed just the information function - by honestly trying to paint the whole picture and give all relevant information to enable customers to make a rational choice. As it is today, it's squarely in the malicious, abusive zone.