Cite as: 527 U. S. 41 (1999)
Opinion of O'Connor, J.
with Part V of the Court's opinion, which discusses this consideration. See ante, at 62 ("[T]hat the ordinance does not permit an arrest until after a dispersal order has been disobeyed does not provide any guidance to the officer deciding whether such an order should issue"); ibid. ("It is true . . . that the requirement that the officer reasonably believe that a group of loiterers contains a gang member does place a limit on the authority to order dispersal. That limitation would no doubt be sufficient if the ordinance only applied to loitering that had an apparently harmful purpose or effect, or possibly if it only applied to loitering by persons reasonably believed to be criminal gang members"). Accordingly, there is no need to consider the other issues briefed by the parties and addressed by the plurality. I express no opinion about them.
It is important to courts and legislatures alike that we characterize more clearly the narrow scope of today's holding. As the ordinance comes to this Court, it is unconstitutionally vague. Nevertheless, there remain open to Chicago reasonable alternatives to combat the very real threat posed by gang intimidation and violence. For example, the Court properly and expressly distinguishes the ordinance from laws that require loiterers to have a "harmful purpose," see ibid., from laws that target only gang members, see ibid., and from laws that incorporate limits on the area and manner in which the laws may be enforced, see ante, at 62-63. In addition, the ordinance here is unlike a law that "directly prohibit[s]" the " 'presence of a large collection of obviously brazen, insistent, and lawless gang members and hangers-on on the public ways,' " that " 'intimidates residents.' " Ante, at 51, 52 (quoting Brief for Petitioner 14). Indeed, as the plurality notes, the city of Chicago has several laws that do exactly this. See ante, at 52, n. 17. Chicago has even enacted a provision that "enables police officers to fulfill . . . their traditional functions," including "preserving the public peace." See post, at 106 (Thomas, J., dissenting). Specifi-
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