Have you seen the idiots out on the road these days?
However, as far as turn signals go, this is one of the less egregious designs. Car manufacturers are given too much leeway in what is allowed for such systems, like putting them between headlights or making them use the same circuits as the brake lights instead of a dedicated light.
Yeah, non-USA for this atm, as much fun as it would be to plug such a system into an apartment.
I believe that the US requires that a direct-feed system has to plug into a physical kill switch setup to prevent back-feed of power during an outage.
Still pretty neat, though!