What Craig Wright is doing is very clever and very dangerous, and the Bitcoin Core team need to understand what he's doing and why.
He is *not* primarily trying to get the bitcoins back from the 1Feex address. That's just an excuse to file the lawsuit. His primary intention is to establish the legal precedent that courts can force the bitcoin developers to confiscate money from one address and give it to another address.
And he will succeed if the bitcoin developers don't prepare properly for the court proceedings. Here's what will happen unless the devs take it seriously and prepare good legal arguments:
* The devs will say it's technically impossible to give him access to those funds. They will be hoping that nobody understands bitcoin well enough to prove that it is in fact possible in a way that a court can understand, and they will try to create confusion in the hope that everybody will give up trying to understand.
...
* The devs will try to invent reasons why the same things can't be done with Bitcoin Core, and all of those reasons will be bullshit. They will be attempts to cause confusion, and they won't work. The reasons given will be either incomprehensible gibberish about obscure technical details, or they will be arguments that the users of the bitcoin software can choose what software to run, and they can't be forced to run software that breaks the existing rules for verifying transactions.
* Wright's lawyers will argue, successfully, that many updates have been made to the bitcoin software that change the rules for processing transactions, and that updates are made on an ongoing basis. They will argue, successfully, that nothing prevents Bitcoin Core from adding an exception for a single transaction to a new update. Core will argue that doing that will cause a fork in the blockchain, as old versions of the software will reject the new transaction as invalid and will reject every block containing it and subsequent blocks. Wright's lawyers will argue that requiring users to upgrade to the latest version of software in order to continue using it is normal and does not cause catastrophic system failure of the type that Core are claiming will happen.
* Wright's lawyers will be correct, and they will win. The court will find that the Bitcoin Core devs have the power to release new versions of the software and announce to users that upgrading is mandatory for the software to continue to operate successfully.
This has now happened. The court understands that the Core devs have the power to update the bitcoin code to make it treat a non-signed transaction as valid. The court also understands that it has the power to compel the Core devs to do that. This is bad.
Even if Wright loses this case, future courts can reference the judgment that was handed down on Friday. Criminal cases, sanctions, and even tax liabilities could result in the devs being dragged into court and possibly ordered to fork the blockchain in the future.
The strongest defense that I see right now is the argument that bitcoin owners and miners will rebel and refuse to use any new version that treats unsigned transactions as valid. The court needs to be convinced that this rebellion is very likely to occur, causing material financial harm to bitcoin users. The best ways that I can think of to present this to the court are:
* Explain that Craig Wright is a controversial figure who is widely hated and widely regarded as a scammer. A new version of the bitcoin software that violates the widely-loved principles of bitcoin for his benefit alone will not be regarded by the bitcoin community as a standard software update. It will not be possible to "slip it in" to the next software upgrade without users noticing.
* Explain that Ethereum users rebelled and created Ethereum Classic after an upgrade was released to remedy the DAO hack. Bitcoin users are even more committed to their principles than Ethereum users.
* Bitcoin has already forked because of segwit. Segwit was an extremely minor departure from the original bitcoin protocol. Hard-coding unsigned transactions is an extremely serious violation of the principles of bitcoin. It would be naive and negligent for the court to presume that no rebellion would occur in response to this violation.
* Bitcoin users would be asked to choose between a version of bitcoin in which their funds could not be confiscated by courts and a version in which they could. Bitcoin users do not hold courts in such high regard that they would willingly grant the courts the ability to seize their assets.
* The bitcoin community has a vision of a future in which bitcoin changes the balance of power in the world in favor of the people instead of the privileged and powerful. To grant Wright the relief he seeks, the court would need to rely on the cooperation of bitcoin users, who would be asked to sacrifice this vision. The court's ruling would be perceived by bitcoin users as an attempt to deprive future humanity of freedom and justice, and to perpetuate the rule of those who currently abuse power. It does not matter whether the court agrees with this perception. The court needs the cooperation of current bitcoin users to grant Wright the relief he seeks.
* To make these facts undeniable in the understanding of the court, the Core devs should invite relevant stakeholders including miners, holders, prominent figures and representatives of industry to submit Amicus Curiae briefs, explaining that these facts are true.