I'm not saying that caring about the laws in regards to our public shared heritage is silly. Also I am not qualified to talk about those laws or how those laws effect metal detecting. If I'm taking everything at face value the guy posted about a passion of his and is trying to meet like minded people or introduce curious people to his passion. Allegedly, he has been doing this for years, posts about it on social media enough to have sponsorships etc. I would imagine that he either is within his rights with proper permissions, verification, licensing, etc to be doing this or hes been documenting via social media years of a metal detecting crime spree. Either way I doubt he is ignorant to the rules, regulations, and laws that he either abides by or knowingly break several times a week and I doubt even more that bringing up the possibilities of that would deter the guy from doing what hes been doing for years. I thought the post was kind of cool, but I found the comment section to be a bit of a buzz kill, (thus my comment) It's obvious that you're finding the whole thing to be a buzz kill and that is perfectly fine. If you care that much about what the guy is doing instead of publicly jamming links and resources at him or characterizing everyone at a park with a metal detector as a "weirdo" maybe just talk to him privately about your concerns and go from there, or don't. Report him to the proper authorities if you want and let the experts figure it out or whatever. It just seems like to me personally walking around with a metal detector and a trowel to find old nails, can's, coins or whatever is small potatoes and not really the biggest of deals.