> (Also, different NDAs are... different, it's pretty tough to talk about them all in general and expect a statement to be true.)

If you sign a contract that says you're not going to share the company's code and then you share the company's code, you've violated the NDA. It's as simple as that.

Being a contractor doesn't grant someone magical immunity to the contracts they've signed. At most, the employee could argue that the contract made them a full-time employee and sue for benefits and such. They can't, however, simply ignore contractual obligations that they've agreed to.