There's nothing pleasing about your counsel to lie to employers, and no way to defend it. You can spin it any way you like, but you have no justification for such counsel. None.

You can back peddle all you like, but it doesn't change the fact, nor does it justify your counsel to falsify data for employers (regardless of whether you think them felons).

You compounded your counsel to lie to an employer with a lie: you stated that an employer asking regarding warning letters is illegal. It is not. You've been wholly unable to show this, because there is nothing illegal about asking regarding a warning letter.

Further, you continue to insist that a warning letter is confidential, with nothing to back that up either. It isn't.

None of your references thus far point remotely to your assertions to back them up. None of them show that asking about a warning letter is illegal. None of them provide a legal reference prohibiting an employer from asking, or requiring that information. None of them state or suggest or provide a legal basis for stating that a warning letter is confidential.

I can state as fact that I've had warning letters (2) come back with FAA record requests as part of the PRIA process, and I've received them when conducting PRIA checks on prospective new-hires.

You attempted to provide legal counsel suggesting that one could sue the Administrator if this happened, but as you pointed out, you're not an attorney, and let's face it, you weren't even aware that certificate action (a "violation") and a warning letter were both administrative actions. Let's hope that you understand that under administrative law, one is guilty until proven innocent.