When a workplace gets "upgraded" to open plan, if two or more workers refuse to come in out of protest, they cannot be fired. Sounds like a great way to work from home for as long as open plan lasts. (IANAL)
Remember this, HNers!
https://www.nlrb.gov/rights-we-protect/protected-concerted-a...
The law we enforce gives employees the right to act together to try to improve their pay and working conditions, with or without a union.
Is the activity concerted?
Generally, this requires two or more employees acting together to improve wages or working conditions, but the action of a single employee may be considered concerted if he or she involves co-workers before acting, or acts on behalf of others.
Does it seek to benefit other employees?
Will the improvements sought – whether in pay, hours, safety, workload, or other terms of employment – benefit more than just the employee taking action? Or is the action more along the lines of a personal gripe, which is not protected?