This threat is interesting too but i was referencing to this thread in particular https://bitcointalk.org/index.php?topic=5374946.0

Tell your alt account which you are both vouching for and advertising it here too that there is no need for people using random signatures from a random private key! Just look through the blockchain and you'll fill a ton of reused addresses https://blockchair.com/bitcoin/addresses

Here is a P2PKH address with $1.2 billion balance
https://blockchair.com/bitcoin/address/1aXzEKiDJKzkPxTZy9zGc3y1nCDwDPub2
and about 200 signatures
https://blockchair.com/bitcoin/outputs?q=recipient(1aXzEKiDJKzkPxTZy9zGc3y1nCDwDPub2),is_spent(true)