While unfortunate for those who's knives are losing the shields, it's a productive discussion. It helps us all know what to look for in GEC knives if we absolutely must have a pinned shield.
Apparently, any shield with features that might be damaged from the polishing process is subject to being glued instead of pinned. Makes sense but that would not have occurred to me if not for this thread.
I've never lost a shield on a GEC knife but I've lost them on two other knives that I can remember. I was fortunate enough to be able to find the shields and epoxy them back on. I don't look forward to the time when a shield falls off and I can't find it.