Makes the general public feel real good about general aviation, military aviation and flying in general, when everyone in the crowd is saying "don't they talk to each other up their?", "Can't they just tell him to go around?", "Why is our military letting some helicopter tell them what to do?"
Now, being a pilot, I know these are all unfounded, but also, being a pilot, I expect that the helicopter pilot landed with a "Please contact this telephone number". At least I hope so, because what he did is extremely dangerous and irresponsible, there are NOTAMs about restricted airspace for a reason, usually to protect people, like this one. If the Luton controller had not recognised the issue - outside their airspace - or had not notified the Red Arrows, it could have been disastrous.