The problem is the huge server side programming to do it, first an autofill system would need to be made, and all character names would need to be stored on the server currently they are only connected to your character, and in cutscenes it uses a variable when a NPC mentions your name.

This system would require alot of work by SE, also if you want to send a tell to the person that ran past you, you type for example de "crap thats all i remember" and it still wouldnt work for that.

How the tell system should work is /sea all de, find the name, hit enter, select "send tell"