As far as I can tell, this "indirect contract" thing does not exist as a concept in American law, and runs completely counter to the idea of a contract. Contracts must have mutual assent. How could you ever agree to a contract if you don't even know it exists? Do you have an example of case law for this?

On misappropriation, do you think it's okay if e.g. a blogger puts a crypto miner on their page? If you choose to request a web page, is it okay for them to run background workers on your computer, and in fact it is theft of service if you do not allow it? Do you also need to give them e.g. location, accelerometer, microphone, and local filesystem access if they'd like to have it? Why are ads special among malware payloads in that you must run them? Why are computer ads special unlike physical ads (e.g. in the mail or inserts in a free newspaper) where people toss them in the bin without opening/looking at them? Or an ad-blocking DVR?

Many of e.g. Google's tracking domains are simply blocked on my network. I don't have any idea of what web pages are going to try to get me to load them, but it doesn't matter because none of them are allowed to. It's ridiculous to say that I must allow my computers to reach out to malicious servers and run scripts they deliver. Must I allow random North Korean servers to run scripts too?

The FBI is part of the government, and the context was that certain search engines (e.g. Google) were presenting ads for scams, and so to protect yourself from fraud, you should install an ad blocker so that you do not see ads.

On morals, I'll put forward that if you have children, it is in fact a moral imperative to remove as many sources of advertising from their lives as you can. Ads attempt to shape them into worse people (pushing them to embrace materialism and hedonism), and their influence should not be tolerated.