Spiffy with the situations you run up on have you ever considered asking the PD for a walkie? Just kidding.
Now to your question. I think brandishing or flashing a weapon is a threat but would I draw my weapon if sitting my my pickup? No, I would call 911 report it and ease out of the area, especially if I am on foot. Call me a coward if you want to but I am not a LEO and don't play one on TV.