No design will ever be able to do that, sadly. Humans are humans, they like to find their comfort zones and not move out of it.

I remember playing rift beta with my good friend from another game, and his friend. I met some new friend and was like "hey invite my friend" when we were doing warfronts and they're like 'why?" I explain he's my friend and they keep questioning it, saying they don't know him and don't want to invite him. I'm like "...really? Don't you want to make more friends?" "How do we know if he's bad? or retarded?" blah blah blah. Basically afraid to meet new people, seriously? I hate this -_-