Cooking saved runner bean seed

Can saved runner bean seed be cooked and eaten?
I've never heard of anyone doing it, so either one can't because they are poisonous or because they taste awful.
But most years I have too many beans left over from being saved, and wondered if I could cook and eat them?
These are large runner bean seeds and not the Barolotti/ French bean.
Any helpful comments appreciated. 

Nice one Mum!  Just what I was going to say 

I've frozen some of mine fresh,just out of the pod to do away with the need to boil. I'm hoping this is a good move . I can't see that it is any different from cooking them in the pod except that they are a more mature bean. Do you agree? If I come across a bean pod earlier in the season that is too big & stringy because I missed it I've always popped it out of the pod & thrown it into the pan with the prepared pods. I've not actually frozen them Emma's as it were before.

Hi there,
Many thanks for all the replies.
I never thought of freezing the seeds, will try it.
Wonder why this topic hasn't come up before. Or has it?
I can now look forward to not composting my surplus as others do.
Terrific.

for the first time ever the OH has been threatened not to pull our beans up till the pods are dry so I can use them.

One question though - do I need to soak them as with other pulses.

They're lovely cooked up this way, I've got pounds ready to store!

I usually peel off the skins after boiling as they look a bit odd (pink and black) against other veg, and it is a bit fiddly doing this, but they're great eaten cold with some garlic mayonnaise and a little seasoning!

I quite like the pink and black. Makes a nice change in chilli con carne