Here's the real deal if you're not a ham or don't have some professional or volunteer capacity that explains why you have radios and scanners:
1. Don't have your car or truck covered with antennas. An antenna or two is no big deal but having eight antennas mounted on the vehicle is sure to attract attention.
2. Don't try and make your vehicle look like an official vehicle. Folks driving aound in a Crown Vicky wirh spotlights, tinted windows and antennas all over are likely to get their plates run by an officer with time on his hands. If it doesn't come back to something that sounds official, you're likely to get stopped regardless of the scanner laws.
3. Don't have emergency lights you're not authorized to have. Most cops aren't dumb and having a bunch of lights mounted on your vehicle, even the clear LED lights, are likely to get you stopped to see if you're a person who's either trying to play cop or rob and rape women by posing as an officer.
4. Don't be someone who's always showing up at the scenes of incidents. After a few times, you're going to questioned about why you always seem to be around when something big goes down and illegal scanners are likely to be the least of your problems then. The reason why we have scanners is to listen, not run out and observe what's happening or, even worse, being there to "help".
5. If you're going to use commercial equipment for monitoring, at least make sure the mikes are removed. It makes cops real nervous to see the same radios if they have with a mike attached. If you're not authorized to transmit on their frequencies, they are automatically going to be more hostile.
6. Finally, if you get stopped, turn off all the damned radios. If the cop hear's the same broadcasts coming from your vehicle that he's hearing from his portable, he's going to wonder why you're listening to their freqencies, especially if a crime just occurred a few minutes ago and in the same area you are you're being stopped.
Most cops have a lot better things to do than hand out tickets for "illegal" scanners. Follow the traffic laws, do the things I suggested above, and be calm and courteous if you are stopped. 99% of the time, the worst you'll get is a warning and, if you're lucky, you get a cop who's also a scanner head and might even be interested in how well you like your equipment.
