They kept Martin Armstrong in jail for 7+ years on contempt of court.
The problem is once they do the forensics on your mobile phone and realize you have not given them all the passwords, they will eventually force you to give them all, and then they will be able to track down that you moved funds. Then they will force you to give back those funds, else hold you in contempt of court forever until you do.
Do not keep access to large funds on the mobile phone you carry with you!
Good advice. Should not be necessary to communicate it in this day and age, at least to those who control a pile of BTC, but probably doesn't hurt.
When you need to physically move a password, then memorize it and move your brain.
I'm not in agreement with this. Even in mainstream-land there is quite a lot of information about 'mind scanning.' Basically pulling information out of people's thought patterns using increasingly capable sensor technology and massive data crunching. Trying to memorize a necessarily complex passphrase seems like one of the things which would make such technology even more effective, especially when coupled with the kinds of more base techniques of psychological manipulation available to those who hold a victim in captivity.
I would suggest engineering a solution whereby control of BTC is simply not available to the owner unless he/she are demonstrably free of influence from attackers. There are many methods of doing this depending on the resources available to a given individual and threats to be protected against, and we can thank the real scientists/engineers in the community for developing them to the point of usefulness (e.g., Maxwell.) It would be unwise to talk much about whatever selection of methods one has chosen for their own use.