I think when someone block other both side should see all previuse comunication but from that point they should not be able to comunicate together. Why I am suggesting this.
1. Because it is a common practice in many other social media like texting, like emailing, like many otheres.
2. Your comunication is your right no one should delete it only you can.
3. Both side must have equal opportunity but the person who wants to block someone has opportunity to screenshot all communications and pictures without other side knows what is going on and suddenly he is out.
I think when someone block other both side should see all previuse comunication but from that point they should not be able to comunicate together. Why I am suggesting this.
1. Because it is a common practice in many other social media like texting, like emailing, like many otheres.
2. Your comunication is your right no one should delete it only you can.
3. Both side must have equal opportunity but the person who wants to block someone has opportunity to screenshot all communications and pictures without other side knows what is going on and suddenly he is out.