I'll leave the rest for a member of UA, but for your point of C flags, I think you may just be retarded. No additional clarification is required, it's common sense. You cannot pull a car out of your ass. C flags are not there for you to spawn a car where you wouldn't have a car. Either need to be at your HQ, a garage, or sometimes just even somewhere secluded or even just around the corner so no one can see you spawn it. And the goal is to never spawn it in front of people when on a main road. Sometimes it's unavoidable, but in this instance, it definitely doesn't work.
Also, that would count as starting a gunfight and dying btw, so if they had shot you, 100% you'd be PKd from that, I understand that's not what you'd be PKd for, but just thought I'd let you know.