[nowey]

and your last statement is untrue:

http://www.npr.org/2014/04/13/301989789/pay-secrecy-policies...

"Under the National Labor Relations Act, enacted in 1935, private-sector employees have the right to engage in "concerted activities for the purpose of collective bargaining or other mutual aid or protection."

The language is somewhat antiquated, but according to Estlund, "it means that you and your co-workers get to talk together about things that matter to you at work.""

[dbingham]

Yeah, but this doesn't prevent a lot of employers from attempting to ban discussion in their employee handbooks. And it's not widely known that such bans are illegal. It's so common it's included in a lot of boilerplate and is de facto accepted as the reality by many (if not most) people.