Wow ... sounds like you've had a career of bad luck in a short time.
To be honest, the horn beepers and other arseholes are an irritation, but the ones I truly fear are the distracted motorists ... and they are getting more common all the time. I had the distinct displeasure on RAW of seeing how bad that can be first hand, and no, I am not kidding.
Is it enough to get me off the road? God help me, no. Not even close.
Instead what I do is this: The best I can to avoid injury. For me, that means cycling in places with reasonable shoulders and escape routes. It means using a rear view mirror and checking it frequently. It means analyzing crashes to try to figure out what went wrong, so I can avoid the same fate.
And even with that, I recognize that I cannot avoid injury or death in every possible situation ... it's always lurking around the corner. But then again, it's always lurking around the corner, whether I'm cycling or not. The way I look at it, cycling adds so much to my life, I'd be a fool to give it up.
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Proud parent of a happy inner child ...