We need groups, but those groups need to be directly based on the local area and exclusive to people who are already known and trusted by members, and preferably not publicly known. An organization you can just ask to join, even if they have an efficient vetting process, is much easier to infiltrate, especially if they are public facing. Im not saying that such groups dont have their place, but what they can be expected to do is much more limited than a completely clandestine organization.