[CaptainZapp]

> Of course it is required in Europe.

That's just outright wrong.

On the last dozens of flights (it may be well in the 100s) within the Schengen area I hardly ever had to show id. And if so it was due to airline policy and checked at the gate.

You badge in automatically by scanning your boarding pass into the secure transit area and then once again fully automatically at the gate.

If you're admitted to the flight by ground staff on airports without automated gates they hardly ever check your id.