I am always watching out for bikers on the road. Give them plenty of space, pause to let them in etc. One time a very out of control driver was tailgating a biker who was flashing his brakes, slowing down a lot and when that jerk swerved to get around the biker at a light I gave the biker a thumbs up then gave him the space he needed till we parted ways no matter the crap people were giving me behind me.. As I was getting ready to turn he waved at me and returned my thumbs up.
I'm always outraged at people who refuse to be mindful of a biker or a bicyclist. And it is always some jerk in a big vehicle, and I'm not talking commercial trucks.
Well, you know what they say about size issues.