As I read tarpon's post, I thought "oh be serious now ...." And I see that many others in the replies share this sentiment.
Tarpon: if you want to find something to worry about (big brother, etc...) then why stop there? If you think about it long and hard enough, you won't even leave your front door in the morning "lest you be mugged" or "lest a lion attack you" or "lest big brother be watching you", etc...
Your caution level and risk-assessment reminds me of a skittish overly-worrisome lady I once knew, who had decided to sell a car she owned. I sugggested to her that she simply put the car on craigslist to sell (which is the modern day equivalent to yesteryear's newspaper classifieds, right?). But she "worried" that someone "she didn't know" would be coming over to her house to look at it. And .... afterall .... "what if they're weird?" I assured her that people buy and sell all the time over the classified ads and deals go down all the time without a hitch. She can just use a neutral place to meet any prospective buyers. I mean .... sure, so what if you get a tire-kicker who doesn't end up buying? Or who has body odor when he comes over to look at your car? So what? Her answer to this was that the person might find out where she lives, and target her for a home invasion robbery later, because afterall, the car was a nice car (a top end Lexus with low miles, etc...) and they might perceive she has money, and target her for a robbery. I tried to tell the lady that people sell expensive cars all the time that are even more valuable than hers, and no, this type of targeting is not likely to occur. Afterall .... I tried to reason with her .... If simply owing a nice car makes one a target for a robbery, then crooks don't need to answer C.L. ads to find car owners to target. They can just drive down the street and see what's parked in each driveway! Doh! But in each case, she was still unconvinced, and wanted to go with one of those expensive car lots where they sell the car for you on consignment.
It eventually dawned on me, that no amount of common sense answers was going to convince this lady that she was not in "imminent danger" for something as routine as this, and no one cared less, etc.. Because you see, her caution level and risk assessment was over-blown and utterly affixed on some silly remote possibilities that "could happen", that in her mind, were very real.
So too is it with you tarpon. If you think anyone in govt. really cares less that you just found a 1960 silver roosie, and will thus follow you around to see where you found it, you're more than welcome to go and hide out somewhere. And by the way, no, it is not "illegal" to dig items over 50 years old, barring some federal parks or something. There are TONS of places where it's perfectly ok to dig targets 200 years old till you're blue in the face. And no, no one's going to follow you around when/if you post your old coins, to see where you found them. Trust me, no one cares. But then again, just like my inability to convince this lady her fears were un-founded, so too is our attempt to convince you that you're worried for nothing, will probably fall on deaf ears.
