The solution to this, is to be somewhat neurotic-- and it is actually quite UNhealthful, but it works to combat this psychological hackery on the part of the advertisers.
Internalize the emotional hatred of the product, and the clear and present disrespect that this form of marketing demonstrates, as a personal slight. Reinforce the association between the two, as you explain to yourself, in no uncertain terms, exactly why you will never purchase the product, nor recommend it to a friend. When questioned about the product, this meditation will allow you to drip all the vitriol you need to discourage the sales through that channel as well.
This kind of negativity is quite toxic; It must be, in order to accomplish the task you desire-- specifically, to condition yourself to deny as many sales of that product as possible, and thus render that advertisement more than a mere waste of money, but into an actual bad for the product's manufacturer.
Just be sure to use discretion when willfully engaging in such a tactic-- Remind yourself the very specific rationale, and do not deviate from the very narrow qualifying conditions you have set for it-- you do not want to establish a pattern of such negative cogitation in the general experiences of your life. JUST for these kinds of abusive advertisement, and to punish the manufacturers or service providers for attempting to use them.
In essence, you need to make it into a personal grudge that you refuse to let go of, but be mindful not to let it fester into a deep seated, malignant, and irrational pattern of hate based decision making. It must be tempered with as much pure reason as possible, for that very purpose.
There are a few products that have entered that portion of my psyche, and are treated in such contempt. It has been *VERY* effective at assuring that I do not, ever, purchase said products-- and, that I will always advocate for the competitor's offering, when questioned about said products.
Not everyone is able to pull off such a self-hack though. This is indeed, precisely why advertising companies continue to do it; By the numbers, most do not, or cannot.