I've been pulled over by the Georgetown PD because I didn't use my turn signal. They can pull over anyone at any time. So the premise that this is needed in order to initiate a stop is a bunch of BS. I'm told Bevin is making a big push for this type of thing, in addition to increased fines, penalties, and impounding the vehicles. I am ok with the penalties, as there are way too many people on the road without a license, registration, and insurance. They don't need to put up a "papers please" checkpoint to harass law abiding citizens as they go about their day to stop those that are driving illegally.
I might have a negative opinion on this due to previous interactions with law enforcement. I grew up in a small town. Between age 16 and 18 I was pulled over 12 times for every little reason imaginable. Zero tickets were issued from that. It was just the police keeping a heavy hand on people. It went far beyond "protect and serve" and crossed into the "you are a criminal you just haven't been caught" approach that some law enforcement agencies take.
I believe the advertising piece is what makes this type of stop legal/constitutional otherwise the courts have ruled this type of abuse isn't allowed.