That's the problem Alan, nothing will change the opinion of the blinkered. I've encountered it so many times in conservation it's ridiculous, and that is from both sides of the fence too.
dealt with quite a few of the blinkered at meetings with NE,
Rod just for you, about limpets and covers the same area. There had been an easterly blowing for a few days, got up one morning and the wind had dropped ideal for west bay, grabbed the rod and a bucket of mussel, as I strode over the rocks in my westgate studded waders there where a few marine biologists "well young ones with no common nouce" with their little metre squares counting what was in them, a young woman started screaming at me, as my studs made a noise on the rocks, you anglers you are kicking all the limpets off the rocks and crushing the winkles and crabs in you studded waders. I calmly put my rod and creel down, she looked petrified as I walked over, went to her square yard picked the biggest boulder up inside it and what was on the bottom of it, all the limpets, winkles and crabs that where sheltering from the rough sea, this is what we are up against.