People boycott things all the time for all kinds of reasons. Some people boycott Israeli businesses due to the Israel/Palestine conflict, other people boycott MyPillow, and others boycott Chik-Fil-A, or more recently Budweiser. The outrage here on HN is a bit annoying, considering this used to be a fairly balanced platform.
As a consumer, boycotting a business is basically the only recourse for whatever grievance (justified or not) you may have which happens to be outside the purview of the law. Or is boycotting not petty only when your tribe does it?