The continual, "the powers that be have been naive/stupid etc etc to let this happen" and "who in their right minds thought this was a good idea" makes one pivotal assumption, as follows:
That they knew what Prince William and Harry do planned to do with their time off at the weekend.
Well, have a little think, and consider what information is appropriate to divulge from Royalty. Their private life is none of our business, IMHO. Clearly, lowlife journos have to take a different view because it ultimately pays their wages by giving eye-catching headlines for the masses.
So, prior to thinking that the RAF and SH force is in any way culpable for doing anything other than completing an FHT as they were mandated to do so, how's about considering the true picture instead of the easy to digest, sensationalised view given by the gutter press.
I put it to you, that you (who have made the statements I alluded to above) are the naive ones, for actually believing what you read in these rags!