By the same standard, you are "cancelling" capableweb because you accuse them of doing something you find unacceptable (in a worse way, since most people would consider "cancelling" to be a worse accusation than "gate-keeping"). Not really a useful level for the word.
> Shunning an individual by accusing them of acting in an unacceptable manner is "cancelling" them isn't it?
Yes. But replying to an individual and telling them why they are incorrect and what you believe correct to be isn't shunning and isn't canceling. It's dialog. Reading interesting discussions is the reason I come here and participate. Echo chambers aren't interesting.