The plaintiff "should not only show his hand, but open it wide." Stangier v. Goad, 163 Or. 314, 97 P.2d 191, 192. Compare People v. Postma, 69 Cal.App.2d Supp. 814, 160 P.2d 221. The general rule is that an injunction will not be granted [2] either to enforce or prevent the enforcement of the crimminal law.