You literally kill/xkill/killall the program.

Thanks everyone for replying. Looks like I wasnt clear on the OP: these drivers literally have their left hand (for left handed traffic) the entire duration of the turn - it almost seems like if they let the signal to “tick” for more than 1 second then a bomb would explode or something. And they always commit to the turn, the signal is just a façade. So the correct sequence is like this:

1. Signal on AND commit to turn at the same time. No delay. Thats why I mentioned these guys dont even look.
2. Car not fully into the other lane => signal off.

Everything takes place in 0.5 second. Or you blink and he’s gone.

Regarding the autocancel signal, yeh I do know about that. On old cars like the 2016 Corrola - you flick the signal, it stays flicked until you flicked it off or finish a turn. On new ones like Mini Cooper / BMW, a gentle flick would signal for 3 sec then automatically turn off. This is something different lol.

Either you use it or you dont. It is good to use it though, make it a good habit. Plus, I want to announce to those around me especially when I am backing up into a garage: I am here, do not stand in my way. If you dont use it, obviously you can cause accidents.

That being said, there is a 3rd group who I absolutely fucking despised:

Those who use it just to show the cops or whoever the fuck around that “look, I use blinkers”

When changing lane or enter a turn, uually this type of driver will go Click-Turn-Click. No head movements whatsoever. Also turning the signal off immediately like the sound of it can cause them brain cancer or something.