That seems like a difficult argument to make because laws don't always align with ethics. Given the myriad of replies around this topic, it seems like opinions on the ethics of violating the ToS are mixed. It gets even more complicated when you consider that very few people have the time/skills to read/interpret such a complex and lengthy ToS. At what point is a company not morally complicit for taking advantage of the layman's inability to understand such a legal document? It doesn't help that the UI/UX seems to deliberately provide incentive for users to blindly accept.

Doubt it. Ever been required to watch a video for a class?

There are limits to terms of service. Where does it end? Is it unethical to mute and switch to another tab to wait out the ad? How about simply looking away? Regardless of what the terms of service says I have the ultimate control of what I decide to take in. Adblocking is a way to assert that right to selectively let in stuff into my sphere of perception.