I honestly gave up on the effort to keep B listing RMTs shouts/tells/ yells.
I just put myself on "busy" status now and continue my day.
If ppl need to talk to me they will either use the fc chat, Ls chats or just plain out shout/ yell towards me.
They will make an effort if it is important right?
Lame solution but it's better than the current one of b listing till full then deleting.