In short, it is my understanding that it is illegal to have a scanner in your car in Kentucky UNLESS you fall into one of the following categories:
1. You are an active member of the news media
2. You hold a valid Amateur (Ham) Radio License
3. You work for a towing agency
4. You are an active Law Enforcement or Fire Employee
As a ham radio operator, I carry a copy of a letter which was distributed by the KY State Police to ham radio operators several years ago to show to law enforcement personnel in the event they want to cite me for having a scanner in my car.
Years ago, I heard of instances where scanners were confiscated and even destroyed, on the spot, by law enforcement officials. And, of course, like most states, if you are involved in criminal activity in KY while using a scanner, you can expect to have the book thrown at you.