you do know that you can surrender half of your bet rather than double down, right? I used to watch these idiots at the casino play war and get a tie, the option is to "double down" or to "surrender half your bet". I ALWAYS surrender the bet because if you don't, you are putting twice the money up toward half the return.
Example, 100 dollar bet is placed in war and a tie is drawn. The "double down genius" fronts the other 100 dollars to complete the bet, he either wins the 100 from the house with his 200 dollar risked bet or he loses his 200 dollars. The WHITE WAY is to surrender half the bet and then use that 50 dollars together with a new 50 dollars to place the next wager, if won, you get the house 100 for your at risk 100 or you lose the 100. The outcome is that between the two hands, White either has lost 150 or gained 100 in that scenario of a tie drawn. The double down genius way would have risked 200 dollars for that same 100 dollar payout. = DUMB DOWN