This is a quote from the book "On Zero Confirmation Transactions" by Chris Pacia to accept fees in exchange for helping to defraud merchants.

You would think that this would be a policy that should be roundly denounced and discouraged at every turn; yet in th
e bizarro world of Bitcoin core development, we not only have developers supporting such a policy, but writing code and attempting to persuade miners to use it! I’ve even heard it argued that, if for no other reason, RBF should be adopted because it will teach people not to accept zero confirmation transactions since they are unsafe. This is the functional equivalent to slashing some...
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