Hey, Jason.
I'm on board with you there. It galls me, too.
But I've got to say . . . it's a generational thing. I see it all the time here ~ with the young officers, not much with the older officers.
-BUT- It's not just the law enforcement officers, it's a lot ~ okay, most ~ of the younger people who have entered the motoring public since driver's education classes were abandoned.
Not just signaling, but lane usage, and merging/yielding, too. The basic rules of the road, motoring skills, protocols, and courtesies that were taught to most if not all youngsters before they received licenses.
Unfortunately, there isn't an emphasis or requirement for driver education training before they hit the streets. And, law enforcement personnel come from that same mass of people.
Yes, I agree. It's aggravating. But I don't know what the "fix" is, because driver education ain't coming back. The public schools don't have enough money for driver education once they finish with political correctness and sensitivity training classes.