The only thing that has tweaked me a bit is that it's currently possible to submit recipes that the member didn't create. I certainly have no issue with someone submitting a family recipe or something that their friend suggested. But, I have seen at least one past winner who found a recipe that a famous chef created, and they submitted that. They didn't present it as their own creation, but I think it's not in the spirit of the competition for someone to win by virtue of their skills with Google.
I am thinking that may be a long while back? People often posted recipes that they googled without even cooking them when the challenge first started. Recently, members have been cooking the recipes they submit, which in my view is how it should be. But are you saying you don't think members should submit recipes unless they are originated by them or their family? I think that would be too draconian. And how we could possibly police that I don't know.
Personally, I am passionate about developing my own recipes and I don't think I've ever submitted a recipe to the challenge that I didn't develop myself. But that is me. Plenty of members use recipes from the internet or from books or 'traditional' recipes from their own culture.