Why a new Network? personaly I think, that one shouldn't start a new social network but leverage an existing one. IMHO the community could already profit a lot

Why a new Network? personaly I think, that one shouldn't start a new social network but leverage an existing one. IMHO the community could already profit a lot from dedicated groups on Facebook, LinkedIn or another existing SN. The network would provide the "Infrastructure" to connect the people who visit and use this site regularly but want a more detailed overview about other people, want to be able to send messages etc.