there is a well organized legal appeal formed. I understand what your trying to say and legally your right. However if there is a chance that an appeal might allow them to reopen and a chance that signing the petition will help their efforts then I am going to get as many people to sign it as possible.
In my opinion, in the US (can’t speak for north of the border) to find an area already zoned for a race track will be impossible without a budget larger than most of us could imagine. To try and use a “special event” zoning or something similar seems perfectly reasonable to me. Zoning can come over time, but its not going to be zoned for race track use if there is not one there already.