Encryption is here to stay, like it or not. As GlobalNorth said, there's already multiple ways to communicate that are not available to hobbyists. If encryption is suddenly outlawed, the conversations that they don't want you to hear will switch to cell phones, data terminals, text messages, etc. That is happening right now all across the country. If you think your scanner is giving you the whole story, you are mistaken.
The encryption argument is pointless. Scanner hobbyists have no influence on this, no matter what you think or how many complain. I'm working on projects that involve encrypted radio systems, and at no time has —anyone— ever expressed concern for the hobby crowd. Anyone that has a legitimate need to hear encrypted traffic can be provided with a radio set to RX only. Hobby use is NOT a legitimate need. Never has been, never will be. It's a form of entertainment. If you feel the need to monitor public safety agencies for wrongdoing (and I encourage and support this) the way to do it is via freedom of information act. Demanding that their entire radio system be set up for your entertainment is a ridiculous idea.