(Disclaimer: I haven't been a Californian for many a year....) When I have had cracks repaired they were effectively invisible. I could get
*real* close and make out hairlines, but otherwise they couldn't be seen.Now I'm an Arizonan and as long as huge chunks of the car don't fall in the path of a patrolman, most such things are usually ignored. (A few months ago my son was attacked on the freeway by a rolling something that looked like a brake drum and lodged above his spoiler - true story!) I am cynical enough to think the complaints are saved until the patrolman wants to pull the car over, though.
Mike