From The Federalist:

Whenever states have eliminated “proper cause” requirements, gun-control advocates have predicted disaster, with blood-in-the-streets and irresponsible behavior by permit holders. But in state after state, concealed handgun permit holders have proved them wrong by being extremely law-abiding. Indeed, none of the right-to-carry states have even held a legislative hearing, let alone held a vote, to move back to requiring “proper cause.”