Isn't the whole point of blocking third party cookies so that you don't send cookies to tracking sites? For instance, if you're on example.com, and it loads a r

Isn't the whole point of blocking third party cookies so that you don't send cookies to tracking sites? For instance, if you're on example.com, and it loads a resource on ads.shadytracker.com, that it sends no information to the ad site (in addition to not accepting them)? If it's not this way, then all the ad site needs is for you to visit them one time and they'll track you from then on.