HN user
Not Linux, and not exactly what you're asking for, but Windows PowerToys has VideoConference mute which seems to install an audio driver that can globally mute. Not sure if something like this exists for Linux.
https://docs.microsoft.com/en-us/windows/powertoys/video-con...
Notably this is made by the original author of Ninja.
The implicit grid data structure from there is a personal favorite of mine. I used it in a game once and it performed incredibly well for our use case.
It's a bit too complicated to totally summarize here, but it uses a bit per object in the scene. Then bit-wise operations are used to perform quick set operations on objects.
This data structure got me generally interested in algorithms that use bits for set operations. I found the Roaring Bitmap github page has a lot of useful information and references wrt this topic: https://github.com/RoaringBitmap/RoaringBitmap
Works for me on FF Android
Their messaging was pretty poor here imo. The email they sent me gave no clear indication that Firefox would have this ability in it's body.
As to 2; I don't follow cable news, but The Atlantic and NYTimes reported a lot of this relatively early (April 1st)
https://www.theatlantic.com/health/archive/2020/04/coronavir...
I guess my concern is I don't think simplifications are terribly useful, since it's not a simple topic, and can change wildly depending on the specific circumstance.
Which is why we have people who are experts in marketing and economy, and specialize in specific product areas.
To first point. Bit more complicated imo. The venue would have to tier pricing (which many do via vip) to not exclude the m people who won't pay $100. But does require more effort on venue part.