Just one person's declaration is enough to make me a 'scab'? No group functions that way. To use a dumb analogy, if I declare that HN is at war with Reddit, and you don't join in, that doesn't make you a 'traitor' to HN. A single member doesn't get to arbitrarily declare a high-stakes situation for an entire group just by saying so.
The question is, what are the actual norms that determine it, and are the current strikers meeting those norms, or have they simply gotten some media attention? By the way, I'm not saying their demands aren't reasonable.