As a rule: people who think this, don't.

I used to think it, too. Then I consulted for a company deep into split testing for marketing persuasion, and it made very clear to me how often I've got an intrusive, consumptive thought entering my brain that I can trace back to an advertisement.

It's why I am pretty militant about ad-blocking (and also paying for things, because I want those things to still exist); I notice it today when I have a really weird "hey, I want that" crop up and derail my train of thought, and interrogating why is often valuable and leads back to the same things. (Even billboards actually work!)

I'd like to think I'm above this kind of manipulation but I'm sure I'm influenced like anyone else by things I'm unaware of.

Yeah, like others said. You don't.