It could potentially be a ruse by egg producers. Certainly there's reason for suspicion. But darth_avocado's claim was that grocery stores were in on the ruse and must have extracted huge profits from price gouging consumers. I think that's obviously false. You'll note that in the jury case the plaintiffs were themselves megacorporations, and substantially larger ones than the producers they were suing at that.

I don't blame consumers for deciding they don't care about the underlying market structure and just want cheap eggs. But you can't run a store on that basis, and if the city feels like it has to there'll be problems.