You beat me to it!
I go to Auckland a fair bit and the detectorists on the beach are a bit like the quills on a porcupine or hedgehog! - well not quite but I just had to say it.
So they are a bunch of pricks. Is that what you are saying?
No not at all - the only ones who are pricks are the ones who drive Range Rovers - as my old man once said the difference between a Porcupine and a Range Rover is that in the case of the Range Rover the pricks are on the inside.