but let it be known - though some have gotten away with TH'ing in Spain - it supposedly is against the law .....
Casper, perhaps you are referring to sources like this? :
Law
But you have to take-into-account, how such resource lists got made/started/assembled IN THE FIRST PLACE. Someone (bless their little hearts) went country by country asking. I mean, doh, who better to ask, than the countries themselves, right? And you "can't be too safe", right? And it "doesn't hurt to ask", right? But when such questions get posed to border consulate lawyer bureuacrat types, it gets sent up-the-chain for review. So archies will no doubt chime in with their take on this "pressing question". And the answer comes back down the line couched in things like shipwreck salvor laws, or things about cultural heritage/historic stuff, blah blah blah. So you'll notice that nearly all the "dire sounding" countries on that list, never actually *specifically* say "no metal detecting". It's usually just someone's morphed opinion of ancillary wording to your "pressing question".
So it gets put into print, on a wonderful link like this. And then 20 years later, it's just taken as gospel fact that "such & such country is off-limits". Meanwhile, as you can see from others posts here, it's not really an issue, so long as you're not snooping around obvious historic monuments.
There was a British hunter who posted, years ago, 15 or 20 gold rings he'd gotten on his vacation trip to a beach resort in Spain. After a few "atteboys", others, like your post Casper, came on to reprimand him for breaking the law. The poster however responded by saying that before he'd started, he'd checked in at the little village's police dept, and with the lifeguards, and everyone just shrugged their shoulders, and no one cared. (it was as if they were wondering why he was even asking). And so he went out every day, in broad daylight, and no one cared.
But sure, the quickest way to bring an end to this, would be to go to the highest levels of Spain's government, "seeking clarification". And then sure, I'm sure you'll find someone, like in that link, to say "no you can't".