As much as I hate to pick sides I have to side with you here assuming everything you said is true, but what we think doesn't matter:
1) I did not know companies today searched cars up on the internet to find out how they are being used, but it is not an invasion of privacy as you publicly posted those videos up there for everyone to see.
2)Subaru/Toyota/Scion HAVE ALL marketed this car for track use and being modified, you can use this in your defense.
3) There are very few other options the only option now that will have the most effect is to lawyer up and take some serious legal action. Most likely I think you got one of the bad batches of FA20
and honestly the way that they are reacting to it makes me want to
you payed for this car, they tear it down, then immediately can't explain the damage so they blame it on track use. Frustrating I know
. But It really is time to get a lawyer get your money back and hopefully either get a new FR-S
or have everything rebuilt by an outside company.