Sometimes, the Krag item, that doesn't look right and appears bogus, proves to be correct and a rarity.
Studying a 'well done fake' is a good learning experience.
The exchange of observations, insights, and knowledge advances understanding - IMHO

I personally enjoy the 'Krag Puzzles' that show-up on the KCA Forum. It's a fun way to learn and a way to stay mentally sharp. A growing pool of vigilant and knowledgeable observers turns up more stuff and helps broaden understanding.

'Faking' has always been a human endeavor.
IMHO - The only good defenses are better knowledge (than the faker), healthy skepticism, trained eyes, and openness to continued study and learning.