Hey random Q: got a friend request; assuming salt incoming but I honestly find it funny so always accept, but I couldn't accept this person's request because they "had too many friends". My question is: if someone tries to accept your request but can't for that reason, does Bnet alert you in any way since players can't send messages to non-friends to let them know hey your friend pool is full? 

Parthenon 11553 on North America server, I want to be your friend - or laugh at your salt, as the case may be :(