That video is classic LTT; interesting idea terribly executed which leads to incorrect conclusions. The latency difference doesn’t matter to humans, but wired is faster.
That would require us as a society to develop concrete solutions to determining who can be trusted. That’s obviously impossible, so we’re stuck with the process we have.
Why would you think that discovery would have to be an SMS/MMS thing?
Since you’ve never used an iPhone, let me explain the experience. When you type in a random new number it starts off green. If the user uses iMessage, once you finish typing it magically turns blue. Apple doesn’t care about whether the other number is an Android phone per se, although if it’s not using iMessage then it’s almost certain that the number routes to an android phone.
That sounds like hell. If you think that carrier interop is bad now, wait till everyone is using a different matrix provider with different optional features turned on or off. At least today there are some barriers to SMS spam, matrix would open the floodgates while making blocking it exponentially worse.
I was traveling a lot for work at one point, and I decided to test this out. I would ask for a new key at every hotel I stayed at, and make a point to not tell them my name unless they asked. They almost never did.
Interesting, when you did so did you know that you were assuming liability for the damage caused by the landlord being unable to access the property in an emergency?