It's also illegal in many jurisdictions (e.g. in the US, viewed as a scheme to defraud advertisers by generating invalid clicks that cause financial harm, by depleting their budgets and push them to spend for fake traffic), but in practice it's way easier to just blacklist that IP / user.

The big networks filter such traffic, the small networks benefit from it.

https://www.reddit.com/r/legal/comments/1pq6kgp/is_it_legal_...

You may also get accidentally get your own website blacklisted or moved to a lower RPM tier, or provoke shadow-ban websites that you like to visit, or... generate more ad revenue for them.

Data poisoning is probably a more effective way to preserve privacy than simply blocking all ads.

I've never understood the use-case of Adnauseam. This just, essentially, allows the adbroker (e.g. Google) to get more money from the business putting up the ad. Unless every single person uses it, it's not going to stop business from advertising, it just makes the likes of Google get more revenue.