The LeastAuthority audit of Ethereum gas economics in 2015 brought up this issue of transaction reordering: https://github.com/LeastAuthority/ethereum-analyses/

The LeastAuthority audit of Ethereum gas economics in 2015 brought up this issue of transaction reordering: https://github.com/LeastAuthority/ethereum-analyses/blob/master/GasEcon.md https://github.com/LeastAuthority/ethereum-analyses/blob/mas... (They also pointed the issue that led to the DAO hack and recommended "value reverts to the sender upon exception".)