I think security of data is where a lot of the open source networks have fallen down. (I'm thinking Diaspora and their SSL-encypted node). Because you shouldn'

I think security of data is where a lot of the open source networks have fallen down. (I'm thinking Diaspora and their SSL-encypted node). Because you shouldn't be trying to close the analog hole, it's essentially impossible (just look at sites like failbook). Instead you should be trying to be about as secure as email, and allow other people to secure it if that's what they want to try and do.