This is the reason that the IRS asks you to declare your illegal income. It can be used as a tool to make catching crimes easier. If using encrypted communicati

This is the reason that the IRS asks you to declare your illegal income. It can be used as a tool to make catching crimes easier. If using encrypted communication is illegal then they can just ding all of the criminals for that, or their criminal activities are harder to operate because they need to hide existence of communication from law enforcement, not only the contents. If it is legal then they have to 1. identify who is doing other crimes 2. prove those crimes. So the more crimes that criminals need to perform to get their "valuable" crimes committed the more likely it is that they get caught for something. I don't believe at all that the means justify the ends, and I think the ends in this case will be only a very minor bother for criminals. But there is some logic to this concept.