If on the other hand as others have indicated there no legal requirements for which pin the Hot and Neutral wires are terminated at, then that is a recipe for problems.
Why?
I believe that there must be some standard that electricians have to conform to and that the connections of sockets are clearly defined as to what each is supposed to connected to, so that anything that demands a ground connection for safety can only be connected one way when the plug is plugged in, so that the switch on the equipment and any fuse in the equipment is in the Hot or Live line so that in the even of a problem, the fuse isolates the incoming supply to prevent the metal work on the equipment remaining connected to the Live and still present a dangerous situation.
I do not follow.
To me, if you have a system that is dangerously less secure if phase and neutral are flipped, then that system is faulty and needs to be fixed. If there is a difference, but the security level with the polarity switched still is high enough to fullfill the requirements in law/other rules, then there is no actual problem. (Do note that we are discussing the system safety in normal operation, not split open on the bench.)
The cases you put forward, are dealt with by the PE conductor and/or the RCB, and it is therefore important that ground mates first, and that it breaks last. Such details are catered for in most well designed plugs and sockets. It is also obvious and fulfilled by all plug/socket systems we've discussed that PE must be unambigious.
Regardless of that case, since you can't safely rule out two different cases,
- Isolating centre tapped transformer or Delta supply
- flipped polarity
...any safe equipment must deal with full mains potential on both conductors of the supply in a way that's no less secure than the "intended orientation".
Issue is moot, and insisting is pointless. IMNSHO.