Still --- like your list in post 67 --- how many of us would recognize even two of them if we somehow came up with them face to face? Much less their siblings, children, their spouses, lovers or whatever else. It's silly to expect airport screeners to somehow recognize some obscure European prince and his female traveling partner --- or else anyone could go to the airport and claim to be royalty and expect not to be searched. If there is any blame, it's probably on him and his lady friend for not making prior arrangements.
I'm sure they were being extremely rude and thoughtless..
And I'm sure that no one knew who they were, or "how important" they were..
I'm also sure there was at least a small entourage, including personal security, aides, etc..
And I'm also sure that they had the appropriate Visas, and Diplomatic papers identifying his rank and status..
It's not "silly" to expect airport screeners and their supervisors to have at least rudimentary familiarity with international passports, Visas, and papers indicating such..
The Crown Prince of Spain may be "obscure" to you, but that is not the case in the rest of the world..
If he were to come to harm, or be kidnapped, it would be an international incident of major proportions..
Guaranteed..
Possibly even an act of war...