The thing is, it isn't an app strictly for what the article says some people use it for. Plus there's a lot of differences between what is "street legal" vs what is race track legal. I know people who buy cars specifically to track them. They may change the tune on their car as a result. Doesn't necessarily mean they are removing parts or doing anything illegal.
Hell. You can use this app if you happen to build a kit car.
I understand that you're upset about the potential impact on the environment. But this is a fishing expedition.
It'd make more sense to subpoena companies selling deletion kits (and outlaw the sale of those in the US).
Love that for him.