“33. When there are two interpretations, one wide and unconstitutional, the other narrower but within Constitutional bounds, this Court will read down the overflowing expressions to make them valid. So read, the two regulations are more restricted than counsel for the petitioner sought to impress upon us. Regulation 855, in our view, empowers surveillance only of persons against whom reasonable materials exist to induce the opinion that they show a determination, to lead a life of crime-crime in this context being confined to such as involve public peace or security only and if they are dangerous security risks. Mere convictions in criminal cases where nothing gravely imperils safety of society cannot be regarded as warranting surveillance under this Regulation. Similarly, domiciliary visits and picketing by the police should be reduced to the clearest cases of danger to community security and not routine follow-up at the end of a conviction or release from prison or at the whim of a police officer. In truth, legality apart, these regulations ill-accord with the essence of personal freedoms and the State will do well to revise these old police regulations verging perilously near unconstitutionality.”