Civil disbediance: gogogo, or nonono?

[SNOWBALL]

My sister is a teacher for the Los Angeles Unified School District. She hasn't been paid in four months. Other teachers are in her same situation. The reason is that LAUSD negligently hired a notoriously incompetent firm to design their payroll software. This company is named BTS. I suspect bribery/corruption is to blame.

Anyways, the union is doing an action that could result in the participants getting arrested. In your view, is it justified to participate in this action, assuming it's basically nonviolent, i.e., occupying an office building or something like that?

2nd question: if you were me, would you go with her? Also, would you try to get other people to go with you? (assuming you have leftist friends like I have)