Idk about morality, but it’s certainly a way to stop dystopian mass surveillance nightmares if everyone capable of building one refuses.

So if you live in the US and don’t want one government agency in the US to have this power (that is ambiguous under current law), one way you can try to avoid it is by refusing to sell it to them and urging others to do the same.

It’s a long shot sure, but it certainly seems more effective than hoping the legislature wakes up and reigns in the executive these days.