GrahamF

At this very moment some idiot is flying around London in a helicopter towing a flag about the size of a football pitch. Has this flag been calibrated and checked out by the CAA and is acceptable for this design of aircraft?

What makes the pilot an idiot ?

On what basis do you assume the CAA do not find this acceptable ?

Is it not a tad harsh to criticise without citing any evidence other than what appears to be an opinion ?

What type of aircraft was it ? And what exactly makes it (to use your terms) uncalibrated or unchecked out ?