The extra line of text just adds to spam and forces other people to use it as well which adds to more spam. I'm not saying ban people for using these textbinds but discourage the use of it and ask players nicely to unbind them.
I'm gonna have to agree with Lunar on this one - I feel like having those double messages with characters you don't usually see catches the eyes of the players and makes the KOSes more noticable