A: No, correctly installed pillar mount spotlights DO NOT reduce the structural integrity of a vehicle.
If it makes a difference, the vehicles are 99 and 08 ford police interceptors
The local police and commercial vehicle safety enforcement are going after me because of factory installed equipment in both of my p71s (which are now only a problem, and weren't an issue for the past 7+ years). Their argument, "in the event of a rollover crash the a-pillars are more likely to fail."
Reminder these are factory installed by Ford before they left the plant, not by me with a drill and a hacksaw. And yes, the spotlights themselves are legal in my jurisdiction.
One vehicle does not have a spotlight installed in the hole.
Not looking for legal advice, more so opinions.