The popular well crafted ones are, but not all are well crafted.

Given that I torrent without a VPN and it had nothing on there, and it also got my location wrong by over 500km, I dont think I’m too worried.

I’m pretty sure that in 100 years time people will look back at the current age of social media with the same kind of horror as we get looking back at doctors recommending cigarettes for weight loss.

All electrons have spin 1/2, that’s a property of it being an electron. They have a spin vector (the arrow shown) and whether it is in the same direction or opposite direction to the magnetic field it’s in determines where it is plus or minus.

Now you might think “but what if it is not entirely aligned with the field, then it wouldn’t be 1/2”, which is true, on aggregate for large numbers of electrons, but if you ever look at a single electron its spin will either be “up” or “down” never any other orientation.

This is the kind of thing people are referring to when they say “no one understands QM”, we know it is the case, we can measure it and predict it, but it makes no fucking sense.