My objection to precheck is that I question how effective it really is. Not to dive into another controversial topic, but it reminds me of proponents of gun control who think that background checks will solve mass shootings. Passing precheck doesn't stop people who appear to have a normal background and doesn't stop people from being radicalized after they get precheck. Perhaps a better solution would be somewhere in the middle? All travellers are subject to precheck type screening (shoes and belt stay on) but go through a more thorough electronic background check prior to each flight? Or our society could have an honest debate about about the risk of terrorism and the most effective ways to stop it...