As I mentioned in a previous post,
Throughout this hat's journey:
The pin wasn't noticed by the person that donated the hat.
It wasn't noticed by the charity shop staff when they were handling it.
It wasn't noticed by the staff when they were handling it.
This hat may have been used a few times or hundred of times, before someone got poked with the pin.
I see that as the pin must've been really wedged into the hat for NO ONE, to have seen or felt it. Be honest OP, before this would you have even considered a pin to be in a hat?
I agree that it could've been a serious injury, but I fail to understand how it could have been prevented, when this hat would've been handled by many people before being put onto your daughters head.