When you receive a Facebook friend request from someone who you would rather not be friends with for whatever reason feel obligated to accept, you have been Facebook friend snared.
Crap! I have been Facebook friend snared! I don't like Lisa very much and she has sent me a friend request. I'd ignore it but we have so many friends in common that it would be awkward to ignore her request so I accepted it.
When you get a friend request on facebook and for whatever reason you feel obligated or feel it necessary to accept their request even though you would prefer not to.
I didn't much like Lisa when we worked on the fundraiser together and now she put in a friend request to me on Facebook. I wouldn't have accepted it but she is so well connected in the community I think it would be a mistake to ignore it. I grouped her under what she is--a Facebook obligate friend.