Blocked Individuals into Group Chats

When you block an individual, you should never worry about them again, but if you have a friend whom is friends with them, they are able to add you to a group chat with the person you blocked. 

Example: A blocks C but B is friends with both A and C. B adds A and C together in a group chat, allowing C to interact with A despite being blocked by them.  

This should be a featured followed by something like a "*User Name* Has *Blocked User Name* Blocked" when someone tries to do this, and of course not having the group chat being made.