Take your chances by deploying a bot to compete with the looter, otherwise you can kiss your coins good bye. Or just talk with a large pool beforehand, you could offer them $10,000 bonus and if they include the tx in their block, other pools won't dare to mine that block again just to take those extra coins.
So you are claiming that
any Bitcoin transaction could be double-spended and therefore
all Bitcoin transactions are insecure. Makes sense ?
What do you think of a challenge? I transfer an amount of x coins, you only know the source address, which I will publish here. Then you siphon off the coins and transfer them to another address before I receive them just like you described the looter would. If the coins end up at your freely chosen address, you can keep them. If they end up with me, you have lost and made a fool of yourself. Deal ?
I am pretty sure he's only talking about the low bit challenge/puzzles, like #66.