You're hinting at one of my personal pet peeves - people who make up new road "conventions" then insist everyone else follow them... which usually leads to less

You're hinting at one of my personal pet peeves - people who make up new road "conventions" then insist everyone else follow them... which usually leads to less-safe situations, exactly like you have described here. This includes people who put on their hazard lights when slowing down in traffic on the freeway. The entire world has decided brake lights are the universal signal for slowing down and/or stopping - yet these knuckle heads think that's not enough. So they do unexpected things and unintentionally create more unsafe conditions where people might not understand what's going on and try to go around thinking it's a disabled vehicle, etc. In general, people need to stick to the well-defined and accepted rules and conventions of the road. That's how everyone stays safe.