The whole friend request thing baffles me. The old system was quite good in this respect: if someone has display name bob, full username bob#1234, when you mistakenly enter bob in the friend request field you'll get an error. Now bob is a totally valid username, and you can't disambiguate. The new system seems much more prone to more serious mistakes and impersonation. I would rather 100X go "whoops, need to add the discriminator" than once accidentally send something to a stranger meant for a friend.