follow up question, why hasn't apple needed to do this? how are they keeping 'tabs' on 'worker power'?
Union-busting, NDA’s, restricting new slack channels, non-competes - all the usual ways!
how is restricting the creation of chatrooms in a communication tool that's likely provided by the company in any way comparable to any of your other examples? If Slack is provided by your company, they would likely have mean to get everything you might have written there, that's already an incentive to move any discussion the company might frown on (like talk of unionizing efforts) on another platform that's not controlled by them.