If I pull up next to someone at a light and let them know something is not working it's usually like you're accusing them of genocide. A rude aggressive response is the norm, particularly from Gringos. The locals tend to glaze over and then run the light to get away from you. Just last week I was behind a beat up pickup truck dragging about 20 feet of rope behind it. I could envision another vehicle driving over the rope and the truck bed coming right off the truck. At the light in Charamicos I gathered up the rope and tossed it into the back of the pickup and the Dominican driver flipped out as if I had just ruined his well planned insurance scam.
With a lot of vehicles these days, you don't even need a screwdriver to change a tail light. I'm perplexed at those who drive an unblemished luxury vehicle and can't seem to find the time or be bothered to perform the most basic checks and maintenance. The right brake light on my neighbors SUV hasn't worked for the last 18 months. I guess as long as it starts, all is good to go.