RE: Would you sue?
It may be out of your hands as an individual, if you got hit in the head with a flying model airplane then there has to be a cause out of the ordinary, such as mechanical failure or negligence on the pilot.
your employer may sue for lost wages,
your insurance may sue for lost wages.
your health provider may sue for costs.
MAAC is deeper than what they believe they are - for instance
1) has maac followed up and studies accidents with a cause and prevention stratgedy.
2) does MAAC have an active safety program
3) has MAAC set safety as their main priority
4) has MAAC studied new safety rules before implementing them to ensure the new rules do not cause more accidents that the new rules prevent.
A sharp lawyer will make mince meat out of MAAC ( and the clubs) on the safey issue if the need arises, just give the lawyer a 3D hovering video with the holder or pilot reaching out to touch the rudder.
IMHO - ken