This is a quote from the book "On Zero Confirmation Transactions" by Chris Pacia
...ransactions envision a dystopian world in which would-be fraudsters pay miners higher transaction fees to ignore the first-seen rule and include double spends in their blocks, essentially aiding in the fraud. In such a scheme, a thief could leave the store with the merchandise, then find a willing miner to help them defraud the merchant and replace the valid transaction with the double spend.

The theory goes that miners are rational profit-maximizers so why wouldn’t they accept higher fees if people are offering? Furthermore, people who hold this view believe t...
read full book block explorer