Spoofing by the way, is illegal. It was made illegal in the United States back in 2010 under Dodd-Frank. Bitcoin exchanges are largely still unregulated and do not police for spoofing, wash trading, and other shenanigans.
…ook some time to read many of the materials published by Bancor, including its smart contract code. I was absolutely astonished by some of the things I found, including what I consider dangerous backdoors.