There is evidence that an aircraft followed hunts, but not that the pilot, purposely antagonised the hunt
I can imagine scenarios where a pilot is following a hunt purely for monitoring purposes with no intention to harass but that it might still be perceived as harassment by the people on the ground who are not used to seeing aircraft at 500feet -- especially a noisy gyroplane. Anything less than 1000ft would intimidate many people.
In any case it is in the interests of all pilots to avoid giving a negative impression of private flying. There are plenty of people who would like to see aviation restricted further and this behaviour just gives them more ammunition.