I very much support workers collecting in solidarity to support each other.

I'm not sure that I like the idea of official agents of a state office, or de facto state office, being authorized to independently choose how to execute their duties.

Would it also be permitted for a group of socially conservative postal workers to refuse to deliver wedding licenses or legal documents to same sex partnerships? To determine which mail had documents for refugees and refuse to deliver those?

Dock workers not offloading boats is one thing, but disrupting the mail is a real challenge for me to get right in my head.