What???
Of course they have the option to use it, they paid for the pass therefore they can use the park.  Parks are, for the most part, public.  Race courses are usually not public for many reasons.
1)  They're competing a lot of the times.  If you poach their race course it's like some douche bag poaching a competition course that's closed to the general public.
2)  It's dangerous as fuck to poach a race course.  If you're below a knoll or something you could get hit by a racer going quite fast depending on the course and seriously injure yourself or the racer.  Plus you'd fuck up their entire run.  That's like someone standing on the landing of a jump during a competition.
3)  They paid for the program, they paid for the course.
Stop being an ignorant fucktard.  Racers are cool, jibbers are cool, big mountain skiers are cool, bc skiers are cool, snowboarders are cool.  Grow up man.
Also, on a similar note, stop with the gaper hate.  Unless they're in the landings and fucking shit up in the park, let them be.  They put so much money into the industry and are on the hill for the same reason as us: to have fun.
This topic is so beaten to death.  God I hate immature pricks.