Quote Originally Posted by Naberrie View Post
Select the person's name. Hit Tell. Put quotation marks around the person's name. Replace /tell with /blacklist add. It would read like this: /blacklist add "Dffhsseas Fdadfds"
There's this, or there is also what I do. Hit tell, highlight name, click on screen, press O, press add name, ctrl-v, OK. Takes probably about the same time (I prefer just clicking through as opposed to repositioning my cursor and typing).

That said... it's still easier to right-click and report spam/block.

There's a super nice macro for when spammers whisper you, though.
/blist add <r>
<3