Left turn courtesy question with MS Paint

[JJSCOTT2]

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Oh yeah, I find it annoying when I'm behind people like OP and they DON'T turn. Particularly when it's a right turn and the right-most lane is open. For some reason if there's a car in either of the other two lanes they feel like they have to wait. WTF is that?

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Because if the guy in the left lane decides to merge right (right into your car) you are at fault. It's a risky maneuver, and you have to drive defensively esp. in LA.

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At this one particular turn I have to make pretty often I find myself thinking about how one day someone is going to just switch lanes and hit me. The reason I know it's going to happen is that none of these [censored] morons ever signal their lane change they just do it on a whim. In that crash scenario wouldn't it be the other guys fault for failing to signal?