The point is, there is always someone trying to push things one way or another, and up until about 20 years ago, it seemed like things always found their way to an equilibrium...
My how things have changed.
https://en.wikipedia.org/wiki/Cancel_culture gives example definitions:
"to stop giving support to that person"
That happens all the time. My Senator consistently voted in ways I don't like, so I'm voting for someone else next election and not contributing to his election campaign = stop giving support = cancel? Yet, entirely acceptable.
"withdrawing support for (canceling) public figures and companies after they have done or said something considered objectionable or offensive"
You'll note that "public figures and companies" has the built-in bias to the rich, powerful, and famous I mentioned - minimum-wage service employees cannot be canceled, according to this definition.
You'll also notice a long history of, say, the NRA withdrawing support from a politician after that politician support gun sale restrictions. And what happened to Kaepernick in the NFL is surely an example of cancelling, yes?
That is, both definitions are so broad that, when stripped of its specific anti-left bias, becomes no different than what John Stuart Mill says we should expect from liberty, and may even be our duty.