"collectors (and dealers such as myself) actually do understand what collecting is all about,and also understand how specimens are discovered and eventually become available for collecting, thus they realize that collecting such common, low value artifacts as coins does not have anything at all to do with looting of archaeological sites."
Does this comment apply to ANY "low value" artifact, or just coins? Why do coin dealers think that coins shouldn't fall in the same category as other artifacts? The idea that illegally digging coins never destroys a potential archaeological site is just absurd.
For anyone that doesn't understand the damage that looting does, or how no questions asked buying perpetuates it, I recommend reading the book "Stealing History" by Roger Atwood. It gives a startling picture of the damage done, not only in terms of the knowledge lost by ripping items from their historical context, but also the physical destruction of precious antiquities that are deemed unsaleable by the looters.
After reading this book, how can anyone who has a love of antiquities or history not stop and think about how the "don't ask- don't tell" mentality of many collectors and dealers is contributing to this destruction? These are exactly the people that looters sell their ill-gotten items to. How can anyone say with a straight face that there is no connection between undocumented buying and looting?