Sure, you should have an attorney help prepare an application ... with a legal memo.
By the way, the final FAM may have more country-specific guidance ... other than a mere 'blue' list. This all stems from the 14th amendment language:
"All persons born or naturalized in the United States, AND SUBJECT TO THE JURISDICTION THEREOF, are citizens of the United States and of the state wherein they reside."
Thus, it isn't really a matter of 'fairness' but of Constitutional Law.
It has to do with the fact that some diplomats and their families are 'immune' from US law (the most we can do is ask them to leave the US as a persona non grata ... even if they commit murder in the US).
With that said, perhaps it is a matter of fairness ... I'm sure that most US Citizens, if polled, would not agree with giving diplomats immunity from our criminal laws, while passing our US passports to their children at the same time.
PS Although I can't directly comment on those friends of yours that got US Passports, it is possible that they were issued in error. Thus, you may not want to rock the boat in a way that could result in their applications being re-investigated.
PROFESSOR OF IMMIGRATION LAW for over 10 years -- firstname.lastname@example.org -- www.capriotti.com -- This blog posting is offered for informational purposes only. It does not constitute an attorney-client relationship. Also, keep in mind that this is an INTERNET BLOG. You should not rely on anything you read here to make decisions which impact on your life. Meet with an attorney, via Skype, or in person, to obtain competent personal and professional guidance.