Need to come up with a secret handshake that can be completed in less than 30 seconds! :-)

In my experience, the more successful organizations scout out who they want to join and invite them. The problem is the huge spectrum of beliefs and personality types that together make incompatibility a given. For example, as others have pointed out, the hippy type survivalists are likely incompatible with those on this forum who might want to participate. Those in deep financial trouble may be viewed as a drag on the rest of the group, on many levels. There are also all types of personalities and some suffering from various degrees of paranoia and even mental illness. Being cautious and doing your homework are really important to having a group that will be productive and stay together. Just my .02, tho.