> nondisclosure of compensation package and disparagement clauses are usually on the contracts as well.

If your comp package has a non-disclosure clause it's illegal. You cannot be asked not to discuss salary in the US.

> People don't want to tip off

That's why it's illegal to be prevented from discussing salary. Discuss your coworkers - you might be the one being underpaid.

ymmv, things like employee at-will contracts are illegal in my area, technically unenforceable, and yet everyone still signs the form.

Fun times =3

	▲	vineyardmike 2 hours ago \| parent [-]
		YMMV = Your milage is controlled by law, and cannot vary. You can sign broken contract freely - it's unenforceable, so you can sign whatever paper HR hands to you, and only when you're retaliated against do you need to care. Which coincidentally is when you stop needing to be cooperative anyways. Don't "YMMV" your way out of laws that protect you.