They are not letting you in to be kind, they are making sure you don't hit them! It is called defensive driving. I have seen too many old folks use your method without the intention of turning around. So I never trust someone is going to look if their blinker is already going. Almost been hit myself a few times because of people using your method and never looking next to them. To me, it's irresponsible, so now when I see it, I am that guy who blocks your kind.
Absolutely couldn't disagree more...
Wow...
I wait for a motion or a flash of lights...
You should try it I think you'd be humbled... Truckers use this method also seems to work for them