- I'm not blind to the dangers of RBF. Here's proof: "What Peter Todd calls "Sybil attacking", in his justification for pushing to change default client behavior to stop rejecting double spends of 0-conf txs, is exactly what Satoshi Nakamoto advocated as an effective strategy for securing 0-conf txs" https://np.reddit.com/r/Bitcoin/comments/3blzes/what_peter_todd_calls_sybil_attacking_in_his/ 5 comments btc