Open Source software is not immune to backdoors, and can also be hacked. I am afraid simple solutions such as “use only trusted software” just are not good enough in 2022.

We need defence in depth, and a physical switch would be one of the best protection mechanism.

Just like developers learnt the hard way that user input should not be trusted, users need to realise that software should not be trusted either.

It’s also fundamentally not possible for the vast majority of people, and I think you know that.

So all you are doing is making the rest of the community look bad, by essentially doing zealot preaching: you’re telling the people who don’t have a choice that they’re stupid for not doing exactly what you do.

Why is it about "the people" doing something? I am not making a choice to use zoom, my employer does. And for my employer it would totally be possible to setup jitsi/blue button/whatever instead.

Similarly, if I attend a virtual meeting elsewhere those people choose what software to host it with.

So feel free to "preach" to companies instead of people.

Which meeting software doesn't support web nowadays? I think even Zoom does it once you break through their dark patterns.

Signal is open source and has reproducible builds.

Yes, and that's cool. Signal is an awesome piece of software but not a competitor in many of Zoom markets.

If you are a student at a university using zoom then there's no other realistic way to participate and learn today. I also can't imagine many employers makng an exception for a single employee.

Except signal doesn’t have conference room hardware and has low group size limits, so doesn’t solve the problems that zoom, webex, etc solve.

I’m also going to get that while bullshit (I trust signal’s crypto a hell of a lot more than more or less any other company) I would bet they don’t have some arbitrary set of certificates or whatever for doctors to be able to use them