I had a CM complain as well. It was our first trip and I had bought pins off eBay bc I had no idea the ones in lots are usually fakes.
My son was making a trade and he handed the CM one off his lanyard that he wanted to trade. She looked at it in disgust and said "This is a fake pin. It's called a scrapper. You can find out more information online" then she threw it in the trash right in front of us.
I was completely mortified and my son was upset. After that I read up on fake pins and started purchasing genuine ones to trade.
That's terrible! I hope you reported that CM.