This is somewhat incorrect. If they knew of it, they should have alerted the authorities immediately. Not doing so is aiding and abetting and they are liable for it.
Unless it's just immoral/unethical... If there's no evidence of illegal actions or potentially illegal actions then I personally would wait for a judge to hear what I know and tell me if the NDA is invalid or not. With that said, I'd raise my hand as well and wait to see if there's an investigation... NDAs can have sharp teeth, even generic legalzoom ones. That's just me.
I can say
I have no NDA with GAW and anything I find out through the course of my daily interaction with code and people I'm not going to keep to myself...