Very often, large groups of riders like you describe are breaking numerous laws pertaining to road-going vehicles, and driving/riding common sense.

That said, and since you have kids, perhaps if you considered a group of cyclists the equivalent of a schoolbus, it might lend you an extra, needed dose of patience. My guess is that during any given timeframe, you are more impeded by other motorvehicles, spend more time delayed in motor vehicular traffic, than you spend stuck behind a group of cyclists.

What kind of feedback would you expect if you posted annoyance at driving delays due to schoolbuses on the forum of a local PTA chapter, or as a letter to the editor in a local paper...?