But here if they can post signatures, then they will be able to calculate Satoshi's block #0 address' private key 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa and that means that the creator of the OP list has Satoshi's private key.
Creating a random address then signing a message from it doesn't mean anything at all.
Code:
-----BEGIN BITCOIN SIGNED MESSAGE-----
https://news.bitcoin.com/online-sleuths-believe-satoshi-nakamotos-bitcoin-stash-is-a-blockchain-treasure-hunt-meant-to-be-found/
-----BEGIN SIGNATURE-----
1s1wZLBTjFZJi8DrN1kogV9ZxRZxwvKQJ
HMoLqUcrjx22an/MrY4uy2z9Nowz4Ag9x3kzsbqz+FaNDSgkH+boXhWUyEkhq4bX8c24Ju+RHwWGltWKopRcg9k=
-----END BITCOIN SIGNED MESSAGE-----
https://news.bitcoin.com/online-sleuths-believe-satoshi-nakamotos-bitcoin-stash-is-a-blockchain-treasure-hunt-meant-to-be-found/
-----BEGIN SIGNATURE-----
1s1wZLBTjFZJi8DrN1kogV9ZxRZxwvKQJ
HMoLqUcrjx22an/MrY4uy2z9Nowz4Ag9x3kzsbqz+FaNDSgkH+boXhWUyEkhq4bX8c24Ju+RHwWGltWKopRcg9k=
-----END BITCOIN SIGNED MESSAGE-----