I have wondered, is it possible they actually TEACH drivers to honk horns like that?! That'd be stupid, wouldn't it. But it seems like no, they do teach it.
There's a driving school set up just off the far end of the campus I live on. From my rooftop eyrie I can see over the wall into where they pile students into training cars and make them drive in slow circles. And honk. From 7 am to 5 pm, that same little parping honk joins my day, every day, irregularly, yet seemingly every 30 seconds or so. Horns are being taught not as safety devices, but as driving tools.
This is madness.