Better would be a new feature that tells the mining bitcoin "please credit generated bitcoins to THIS address (instead of a new one)."
Yes, please please please do this. It would be much saver having a miner mine to an air gapped wallet than being forced to mine to an online wallet.
My rigs are in a server room and I would feel saver if I could run them without a wallet worth 1000$ at a time on it each time it hits a block.
Is this still considered to be a bad practice / untested?
You are quoting me but my subject was unrelated to the FAQ as the FAQ talks about the same wallet on different machines while I am talking about mining to a different wallet than the one on the machine.
Having forks of a wallet is still a problem and most likely will stay a problem with many ways to loose your money. Don't do it. In doubt, generate a new wallet and transfer all coins to it. If an old backup was compromised it is not enough to generate a new address and send all coins there. Just generate a new wallet and stop using the old empty one.
Concerning my question above, sure if my mining machine was compromised, it might already be mining to a different wallet, so now I think having a feature to mine to a different wallet does not add security but even be bad for security as finding blocks for others might go unnoticed.