[debacle]

You are completely correct, however I have personally seen two employee handbooks that forbid discussing salary and, living in an at-will state, I'm sure if I discussed salary I would be fired for something completely unrelated.

[kasey_junk]

I have as well and have pointed out that it is probably illegal and potentially opens them to civil liability.

I've also seen manager training materials that specifically tell managers not to even hint that salary is a secret topic as the liability involved is problematic.

It is one thing to claim that worker protections don't exist, its another to claim that you refuse to take advantage of them.

[kenko]

It's still true that you have limited practical redress if you're fired (especially in an at-will state).

[dbingham]

I've also seen an employee handbook that forbid salary discussions. When I politely pointed out to them (with references) said statement was illegal, the response I got was very cold.