There is no law protecting individuals from protesting against their company just as there is no law that says they can't be fired or subject to retaliation.
IANAL. I suspect you are not either.
According to the NLRB, you are not correct.
https://www.nlrb.gov/rights-we...
Even if you're not represented by a union - even if you have zero interest in having a union - the National Labor Relations Act protects your right to band together with coworkers to improve your lives at work.
A single employee may also engage in protected concerted activity if he or she is acting on the authority of other employees, bringing group complaints to the employer's attention, trying to induce group action, or seeking to prepare for group action.
Emphasis mine.
It's gotta be a publicity stunt. I smell money somewhere in all this.
By that definition everything is a publicity stunt. It's a sloppy definition. I've only found one instance from 1802 that uses that definition of publicity stunt.
Specifically, the Aerohive Network doubled the prior emissions in Fay classrooms from 2.5 GHz to 5 GHz.1 Exposure to the emissions from the highdensity Wi-Fi now used by Fay is dangerous to persons having an aggravated sensitivity to those emissions, as will be explained in more detail further below.
"Consistency requires you to be as ignorant today as you were a year ago." -- Bernard Berenson