Now I am confused again. Terri, you said it won't work, but Alan you said it will. What makes the commercially available oysters rockefellar work and personally made ones not? hmmmmmmmmm That's a wondering.
If you can't pry them open, your oysters are still alive. I suppose you could freeze them, but you would definitely kill them if you did. If you froze them on the half-shell, they would not be very palatable once thawed.
When I have opened a raw clam that was bad/dead--it smelled terribly. I have never had a bad/dead oyster luckily. No, you cannot freeze oysters in the shell unless you mean for one hour to make them easier to open.