GrapheneOS team has a pretty level take on the issue in the original thread:

This is fearmongering based on customer support making ridiculous claims to someone. There's nothing illegal about using GrapheneOS and the customer support is nearly certainly making it all up to get the person to go away so the ticket can be considered closed. It's unlikely the company has done anything to specifically detect GrapheneOS or ban using it. It's far more likely they detect not using a Google Mobile Services operating system without modifications. This customer support person went on a power trip to scare someone and get the ticket closed.

This particular community loves to play the paranoid victim, which is unfortunate.

I agree, but Sony literally helped invent DRM. Sony went all-in on "fuck you" to their customers back when we all adored them for the Walkman.

And it feels like they have only rarely done better, since then, after exhausting all other options.

So I agree - we do jump there too quick.

But when we are discussing Sony, the ire is valid anyway.

Everyone at Sony can go fuck themselves - today, yesterday and just generally.