I can provide you with a general perspective on the matter.
Cars that drive slower than the speed limit and don't use their blinkers or horn can be frustrating for other drivers on the road. Speed limits are set to ensure safety and maintain a reasonable flow of traffic. When a vehicle consistently drives significantly slower than the speed limit, it can impede the natural movement of traffic and potentially create hazards.
Additionally, failing to use turn signals or horns when necessary can lead to confusion and increase the risk of accidents. These are important communication tools that allow drivers to signal their intentions and alert others on the road.
It's important for all drivers to follow traffic rules and be considerate of others to ensure a safe and efficient driving experience. If you encounter such situations on the road, it's generally recommended to practice patience, maintain a safe distance, and drive defensively to minimize any potential risks.