Not sure if putting them in the oven would affect them in some way?
I'm going to jump in there and say don't eat them. I have a jar of beans that I use for baking. After they have been baked, I return them to the jar for the next time I need baking beans. I have not tried to bake with them, but they look a bit toasted and I'm guessing they might not soften up properly.
No. Use foil and coins, they have more weight and you can use them again and again.
I agree with pantry shelf. You can continue to bake with them multiple times.
I don't use any weights. I dock.
I'm with Sam1148 - pennies work great, transfer the heat better than beans, and are reusable. Don't eat the beans after you use them as pie weights
I have one jar of dried beans that are dedicated pie weights. After baking once, I doubt you would want to eat them since they wouldn't rehydrate & cook properly.
Of course ceramic pie weights are not expensive and will last longer than beans.