The article is the usual crap spewed by the smog-belching crowd. It's funny... you can get a long line of cars behind a piece of farm equipment or a delivery truck and nobody tries to run IT off the road. But, see a guy or a group on bikes - without the 'cage' of protective steel, well, just run them into the ditch!
BTW, with large groups, it is easier for cars to pass a double paceline than a single paceline that is twice as long.