In my 780,000+ miles of non-racing road-riding, I've seen much, some like this. Here's a few things I used to teach in our Motorcycle Safety courses:
#1: You're invisible. Drive like it. NO ONE will EVER see you, because they are looking for a truck.
#2. The other guy is stupid. Assume that 100% of the time. It's crude, but may save you. Cell phones make this worse.
#3. If you have an ego or a temper, LEAVE IT AT HOME. It will kill you on the street. And, the bigger your ego, the less displacement you should be riding.
#4. Learn to ride. Learn to stop. Learn to slide sideways and yank throttle so you can bail off your bike. BE IN SHAPE. Don't sit on your saddle, RIDE it. Throw it around, drop it, jump off of it. Do this in an empty parking lot, by the way...these things will teach you far more than anyone can explain with words. And, it will make you aware and humble in traffic, which is the best way to be.
Ride safe. Always.