I spent a decade inside the online ad industry. As such its time to spill details on how everyone can get pwned if they aint careful. Ill also explain what you can do to hurt multinational advertising budget spends.

warning this will make you more of a cynic

• the anthem: this is used to tie an industry to your patriotism to buy the product (e.g.: go to a game). You then associate the product with being in favour of your country, despite what it may be or allow.
• demographics: used to bracket people into logical clusters in a vain attempt to optimise ad spend.
• pandering: hot chicks for men, buff dudes for based girls, and diversity for leftists. Anything to sell product. Remeber, its all about the sale.
• online surveys: you think these are just to give you some insight into yourself? That prople are beyond using your personality details or iq info against you? Dont make me laugh. They are all designed to omnomnom your details to model against the rest of a society. Avoid taking these like the plague.
• sales data: what you buy is measured by other systems. EPOS commerce data, in large quantities, can also yield massive insights. What you buy will influence business patterns, so make sure you never buy woke.

Now how you can hammer advertising budgets en masse

• data controls: due to eu law, multinationals have massive control requirements in place to allow you to manage your data. Upside is you can blast this away easy, and if you are European demand that data be provided too (or the company faces fines). This body even censures and charges the british hmrc with fails, so its got some nads to it.
• iploc targeting: you cant avoid some location data forms. Only vpn can give some sec here, and only if gps is off. You can bypass some youtube bollocks too this way if you want too (free pnp mode, some algo censors, geolocking)
• retargeting: the bane of the industry because somehow it keeps performing. This is where a product you looked at once follows you around for up to 90 days. Set your cookie retention as low as you dare, and it will knock it back.
• geodata: driven by gps data and mobile phones, this is an easy block to begin with, but hard to keep in place if you dont keep an eye on the setting. Some phones are better at handling this than others, but none seem to crack it.

I'll be thinking of more later but this should give y'all some do's and don'ts.