>There is a difference between exploding a bomb

Mines (in wars, as implied by "solider") aren't illegal. Also even for the first example there are certainly improvised explosives you can set up that isn't criminal to create or set off, fireworks for instance. Same with a barrel of gasoline. It's certainly a crime to use it to kill someone, but that's my point. By OP's logic it's not the person who set it up's fault, it's the person who triggered it.

Intentional destruction of evidence is also a crime. Now, whether this applies to this scenario I suppose will have to be determined by the courts.

Destroying potential evidence before suspicion is not a crime. Destroying it once under suspicion is a crime. So anyone can destroy their data at their hotel room even just before entry even if the data contains evidence of crimes. Of course the courts could take that into evidence to support the argument that there were crimes but it would not be a crime in and of itself.

Deleting your data is absolutely a crime when you know the authorities could've wanted whatever it was you deleted -- even if they haven't told you yet. It stands to reason that providing a duress PIN that deletes your data when entered would be a crime as well, if said data is of interest.

Not to say that I personally agree with either of those cases. But what is considered crime can get pretty unfair when it comes to the authorities thinking you did something wrong.