I volunteered to go to a website, that volunteered to use that service. I can choose not to visit the source sites or the associate ones.
How do you know those sites have those trackers before visiting them? The only way to "opt-out" of the sites with such trackers is to stop using the web entirely.
Against whom? Facebook? Google?
How about GOVERNMENTS.
Actually, yes. In the (European) country I live in, public organizations have been prevented from invading privacy (e.g. setting CCTV cameras) by our national data protection commission.
If you ask me, any sort of nefarious behaviour commited by web companies are most likely the product of a larger, coercive form of behaviour starting from the government.
How is web analytics and personal data mining a product of State spying? And even if it is, how is it justifiable on that basis?