The primary reason for this would be against thieves, but it would work against courts as well, and the user wouldn't have a choice.
People here are choosing to make things harder for themselves by coming up with ideas to skirt the law, but it doesn’t work and will only make the police go harder on you. The law (and precedent) is not on your side in this battle.
Destruction when handing to a mugger is still ok.
Judge: "Hand over that phone right now"
You: "Sure, I can hand it over, but all data will then get wiped by the device automatically due to Google/Apple/Samsung's anti-theft design and I don't have a choice"
After that it's upto the Judge whether to proceed with the handover or not. It will be the judge who destroyed the data if so.
The primary motive of that design would be against thieves, but it would incidentally happen to work on judges as well. The owners of the phones would have no choice.
Yes, they could do that, and of course, in that case, my eyes would be on it and they would only be able to ask for things pertinent to the case, which likely means all corporate accounts, not dig through personal accounts.
Them being unable to take the actual device means that they'd have to play by the rules.
That idea extended to civil procedure and phones is that the discovery process for a civil case would be for things related to the lawsuit of which your personal phone might not be. They could certainly request it, but a good lawyer would argue that your personal phone has no connection to the work phone (of which the lawsuit is about) as evidenced by the fact that you have two phones (you intend to separate the two matters). Separate profiles on the same computer (phone) would be harder to argue.
It’s not a clear cut matter and would certainly depend on how the judge is feeling, but if there’s a possibility of keeping your personal and work life separate, why not do so? Don’t put all your eggs (data) in one basket (phone) and the like.
Also, you can’t just not respond to a deposition or refuse to hand over your phone as evidence in a crime. That’s obstruction of justice and possibly contempt of court.
Basically, you can sit there for hours on end explaining that it’s impossible to break the “wall”, but that’s time and time in money in the court system (literally), or you can just fork over the phone because it’s not your personal one.