Sour...jerks anywhere, whether the be on bikes or on forums, do not really have a good reason for acting like jerks. As for me, if I had approached them when they stopped I would have run over a couple of their bikes and then told them how sorry I was. At my age, living in a small country town, shotgun in back window, I am sort of like MFB short a few inches but large on firepower.
As for my friend...Speckledhen...I would suspect that some jerks on bikes just ticked her off one too many times and it is too easy to sit here and spout about road courtesy towards bikers until you are on a winding country road trying to get somewhere and in front of you are a couple of jerks in tights dancing in the middle of the road with their bikes.
Actually, I have had very few encounters with bicyclists on any roads. We give them a wide berth, if there is a place to go.
I have always felt this way. IMO, bicycles do not belong on roads with vehicle traffic. It's just as simple as that, so don't make more of it than it is or make assumptions.