Is there a term for something illegal recognized by the courts as legal? TSA searches fail to catch 95% of illicit objects (including bombs) according to their

Is there a term for something illegal recognized by the courts as legal? TSA searches fail to catch 95% of illicit objects (including bombs) according to their own tests and require detaining hundreds of millions of people per year who have not given any indication that they've done something wrong. If those searches aren't the "unreasonable searches" mentioned in the 4th amendment I don't know what is.