I was born in and i was aware that we shun disfellowshipped ones. I had no idea that people could disassociate. I thought you could just go on your merry way and continue being friends with witnesses. It wasnt until i was about 24 that i learned if you leave you get the same treatment as a disfellowshipped person.
And remember, since infancy i was taught the disfellowshipped people are the ones who wernt sorry for what they did. So i thought shunning them was right. A picture was instilled in me of a self rightous, rebel sitting in a JC with 3 elders pleading with the person to repent. How wrong i was.