This passage describes a really different situation though. Say I have a USB Stick with important data on it. It has a warning label on it that says "if you pl

This passage describes a really different situation though. Say I have a USB Stick with important data on it. It has a warning label on it that says "if you plug this in, it may destroy your computer unless you have the correct password file.". If you plug it in (and your OS is vulnerable) it wipes all drives (including itself) it can find unless it finds a particular password file. Is this USB Stick illegal? Signal made it very very clear that scanning their users with Celebrite tools might trigger some behavior. Now if you still go ahead and use this tool can Signal be blamed, despite warning you that this will occurr? I find all of this far from obvious. What Signal did is purely defensive _and_ clearly labeled. It's very unlike the examples cited so far. (And after all we are talking about a scenario where the cops can still get the evidence simply by taking screenshots of the open app, so they are not even preventing cops from getting to the evidence, merely making it more inconvenient.)