> What's the point of a law against breaking and entering? A criminal will break and enter anyway!'
Laws are about justice not prevention.
Other laws are enforced without the criminals cooperation or consent. For example you stab some one, cop finds the knife with your finger prints and the victims blood case closed your off to jail.
This law would be like the cops requiring you to hand over the bloody knife and if you say no then the cops will have no evidence and little recourse but to arrest you for the lesser crime of lying to the police, not very effective.
You said "Can't you say this about all laws?" implying that laws are redundant since criminals won't follow them and obeying citizens don't need them. But that's only true for Criminal law, not for other types of law because people might be breaking the law unintentionally that's why we need it.
To give a trivial example, killing someone would be an example of a Criminal law and you would be right. But tearing down a supporting wall in a block of flats to expand the living room would be an example of a law that needs to be written down because it's not obvious and clear to everyone.
I never said that laws where redundant I argued that any law that requires cooperation to be effective is inherently in-effective on anyone that won't cooperate, namely criminals.
'What's the point of a law against breaking and entering? A criminal will break and enter anyway!'