Whenurhappy,
Valid points in your first paragraph. Problem is that if nothing is done and the Argentinians do invade successfully (discussions as to how this possibly might be done are also in this thread) The UK then has major issues internally & externally.
Your suggestion for a referendum is interesting. Cameron could off course mention that a referendum has already been held. Giving in to Political interference from an external country is not a good way to go. Having said that, how relevant is a referendum? The Argentinians themselves have said that the principle of self-determination was not applicable to the Falkland Islands on many occasions. The Argentinians have actually absolutely no right what so ever to the Falkland Islands. If we were to listen to that then the Argentinians would have to return Argentina to the Amerindians and depart; as would much of South America, The United States and elsewhere.
Why are the Falkland Islands, Gibralter, Guernsey and Jersey an anachronism? What makes them so? What is the relevance of place being adjacent to another. Should Germany and every other nation belong to someone else as they are adjacent to at least one other country?