Facebook Obligation
When someone sends you a friend request and you feel like you've been tricked into a cult and you have to accept it or you'll be haunted by your friend's future posts.
I got a friend request from my old gym teacher and I had to accept it because I'm too scared he'll send me a message about my bad posture.
My coworker sent me a friend request and I accepted it because I didn't want to seem like I didn't want to be friends with him.
My mom sent me a friend request and I had to accept it because I didn't want her to know I blocked her.