I don't mind when folks want something flashy or out of the norm, even with their guns.
But the REAL problem with those silly things is that they have one value -- as new, unfired. There's no collectibility for one of these things if it's been fired.
Literally, they are worth less than the basic gun they mimic if they've been fired at all.
Me, I'd so much rather have a gun that I can shoot. Those commemoratives are paperweights.