Of course I know that. But how do you get those few satoshis?
Do you realize that 99.99% of the bitcoin holders will NOT know about that bug feature of the protocol, or would not have the means or interest of exploiting it?
So how are you going to meet the 0.01% of users who know that, have got some coinbase satoshis from one of the branches, and are interested in trading single-branch bitcoins?
Well the same way you get satoshis right now. You either mine yourself or find someone that can provide you with them.
If you think 99.99% of the bitcoin holders will NOT know about that then you are lying to yourself. I do agree that there will be some that will not know about this, but 99.99% is an absurd percent. Also it's not a bug. It's a feature. It's how the system works. It seems that you still don't understand it.
By the way, there is a minimum delay of 50 blocks (IIRC) before one can use coinbase coins, presumably to discourage this sort of hackery. On a branch with 25% of the mining power, that means at least 2 days. Wlll that branch survive that long?
It's 100 blocks, not 50. And it's not a hackery. It's how the system works! Is that so hard to understand?
Also you don't need to taint the coins from the 25% branch if a hard fork happens because you already have coins on that branch. You will need to taint coins on the other branch that has 75% because on that branch you need tainting. Are you drunk?