A notam is going to do a whole lot of good if they are doing 360kt at 2000ft
Nigel has mentioned what would concern me: Are your birds respecting notams too? In Canada we have a 250KT speed limt below 10,000 feet. I understand it is there primarily from a birdstrike hazard point of view.
I propose that it is irresponsible to endanger an aircraft and crew, who are on nothing more than a demonstration flight, with an increased birdstrike hazard, let alone the danger to those on the ground of a striken aircraft coming down upon them!