Is there a social networking website for my neighborhood watch initiative?

[Sanoski]

We have a lot of scammers come through our neighborhood. Some are door to door scams and others are letters. I wanted to set up a social network for my neighborhood where we can all talk and share information concerning things happening here. Only those people that living here will be given credentials to log into it. I thought about Facebook, but people want something more secure. Do you have any ideas?