Foggy, what country is this? I have gone back through your posts on this thread, and don't see where you mentioned what country you are from.
And this might sound like a dumb question but ....... if it's "illegal to detect in your country", then .... how have you been "detecting in your country" then? Sounds like no one cared, until you brought your stuff in and paraded it around museums and archies to comment on. (Moral of that story?)
I'm not sure what country you are referring to, but there's been an oft-repeated mistake, when md'rs read "dire sounding laws" of some European countries, that they think that means the entire country is off-limits. But if you read closely, those laws are usually referring to public lands. Afterall, the laws are "public", thus referring to "public lands". Therefore private lands (what the farmer chooses to do on his OWN land) is outside the scope/coverage of those laws. Or even to the extent you may be in one of those countries where "everything under the ground belongs to the crown", well then duh, that's no different than England. But as we all know, detecting goes on there all the time (and people even keep things they find) in private farmers fields. Why? Because the govt. is only keeping things (for their museums or whatever) that are significant. Ie.: caches for instance. They have utterly no interest in singular coins, no matter how ancient.
Now as I say, I don't know what country you are in, but as far as the archie you spoke to giving you scary sounding warnings, telling you it's illegal and so forth, here's my thoughts on that: What did you expect coming from an archie? They're diametrically opposed to md'ing hobbyists, so of COURSE they're going to spin things (even if stretching, and even if no one else really cares) to tell you "you can't detect". For example: State of CA (where I live) beaches can be detected till you're blue in the face, and no one cares. However, one day, years ago, a friend of mine ran into an archie who just *happened* to be at that beach that day, getting ready to speak at a museum. And my friend just *happened* to be detecting there that day. And the archie just *happened* to look down from the parking lot and see my friend on the beach. The archie walked down there and read my friend the riot act! Tried to tell my friend "you can't detect state of CA beaches", blah blah blah. Now obviously, the archie probably went back to state capitol to his desk, and the matter was probably soon forgotten about. Other such archie incidents/stories have occured here, and I suppose in other nations, along the same lines: Example: Archies from Kentucky university trying to insinuate that detecting on all public land (on every single level) in KY was "illegal". That was/is blatantly false, but do you really think you're going to win a debate with an archie?
Bottom line is: If I was you, I'd stay far from archies (unless you already know they're cool). The LAST thing you want to do, is parade your finds in front of purist archies, in ANY country, lest they spin all sorts of bologna for you.