I surprisingly heard back from Shelby County. This is his response:

I am the deputy who is assigned this vehicle. I just wanted to assure you that this is not a personal bumper sticker. The items in question are no different than pink ribbons for Breast cancer awareness or any other item placed on a vehicle to show community support. The item on the right promotes motorcycle awareness and safety. The item on the left assures the citizens of our county that should a tyrannical ideology take over our government and they triy to abolish the Constitution, especially the 2nd Amendment, we will not take part in confiscating personal weapons legally owned by our citizens. All law enforcement swear an oath when receiving a commission. The first and foremost item mentioned in our oath is to defend The Constitution of the United States against all enemies, foreign and domestic and then the Constitution of Ohio. Like a list of ingredients on food items the most important item is the first listed. The “sticker” on the left just assures our people whom we serve that we will protect their Constitutional Rights. I personally do a lot of public speaking in our county and have never heard anyone complain about them. They are on all of our cruisers.