There's a few if, buts and maybe's attached to that.
The officials have a duty of care to the riders to ensure their safety (to the best of their ability)during the period of the permit.
Example. A new obsticle has been added to the track, but never tested under race conditions, as it turns out, it causes a whole heap of bad crashes in the first couple of races, it's quite obvious that the obsticle hasn't been formed right, a number of also approach the C of C and complain that it's dangerous. The club has a bobcat at it's disposal. The officials have a duty of care to either reshape the jump or divert the track around the jump.
As GD66 says if the rider did nothing during the course of the day, then complained after the event direct to the SCB, I'm surprised they even reacted to the complaint.
But if the rider complianed all day long to officials and they just told him to "suck it up princess, this is motocross", then there maybe some serious repocosions.
Did he/she complain to the scb that the track was dangerous and no one did anything about it, or, that they complained to the C of C all day and no one did anything about it?