The "anonymity" of the internet makes it a good place to ask questions about suspect firearms. While I also have concerns regarding threads about "Is my bring home military gun legal" I also appreciate that the authors are asking for advice as to avoid legal complications.
That is part of the function of the forum, IMHO and as long as the boys (and girls) in bold allow it, and the conversation is civil, then I'm in no position to argue it.
The "anonymity" of the internet - hope nobody is naive enough to believe you can really hide out on an internet forum.
If BATFE &/or the FBI wanted to track your physical location down to see if you really were in possession of illegal firearms there would be "suits" knocking at your door tomorrow morning or sooner.