In my state, nobody is required to sign an IEP. Consent for evaluation, consent for initial services, require a signature. Everybody signs off on eligibility for Specific Learning Disability, and teams reach a consensus on an IEP without controversy most of the time.
But eventually, a school sometimes has to say, "Here's the Free and Appropriate Public Education we're offering. Take it or leave it." And if the parent feels the school has done wrong by them (which sometimes happens, but usually out of ignorance rather than maliciousness), there are several legal options from that point.
