If the engineers read the documentation of the code they were using it was explicitly spelled out what they were doing was a "bad idea". You're also arguing tha

If the engineers read the documentation of the code they were using it was explicitly spelled out what they were doing was a "bad idea". You're also arguing that automotive engineers don't have a basic idea on what emissions regulations exist. As an aside, this same argument could also be used as justification for NSA programs that violate civil rights.