Vigilantism without oversight, checks and balances quickly devolves into posses terrorizing and brutalizing people they simply don't like. The US has a long history of this.
Vigilantism is not the same thing as community-led policing from members of said communities.
That's nice, but none of this has anything to do with "vigilantism." The other guy only used that word because he thought it sounded scary. If either of you knew what it meant you would understand that government-sanctioned action, for example a lawsuit with standing provided by statute, is the complete opposite of vigilantism in its entire definition.
Vigilantism is not the same thing as community-led policing from members of said communities.