1. Your stating that laws against pornography and prostitution are unconstitutional does not make it so.
Your claim that I've said all laws "against pornography and prostitution are unconstitutional" is ludicrous. States & localities can reasonably regulate the public aspects of such activities, while the criminal aspects of such behaviors have long been covered by our common law.
2. Never been to Utah. But I know that they cannot ban adult bookstores if they so desired.
Wanna bet? The moral majority rules in Utah.
The State is ringed by porn shops just across every adjoining state line. There are none in the State.