[sillysaurus3]

You are indeed out of luck if you sign such a contract, which is why it's so important to refuse to sign any such contract. If you're hard up for money (been there), it might seem crazy to risk not getting a job by complaining about the contract you're about to sign, but trust me, the employers are usually more than happy to carve out a clause for you. They want you working for them more than they want to assert dominance over you.