In 2003[1] in Southern California some of the workers who worked at supermarkets went on strike, and picketed certain corporations' stores. For a significant period, the remaining public had to go to other stores if they wanted to avoid the picket lines.

As pointed out in [1] a wild fire [2] ended public support of a boycott. I personally lived in the area affected by the strike, but with the hours I worked I could not be choosy enough about where I bought food to add "support strikers" to my calculations, and then the fire [2] made any extra driving related to labor organizations' wishes borderline illegal and definitely antisocial.

You will also read in [1] that the supermarkets that were struck might not as easily be affected by a strike if it happened today.

[1] https://en.wikipedia.org/wiki/Southern_California_supermarke...

[2] https://en.wikipedia.org/wiki/Cedar_Fire