User blog comment:FairyRaven/Fairy Tail Chapter 300: Where the Dragon's Soul Rests, Review and Commentary/@comment-415040-20120921210022/@comment-5268982-20120921210802

Yeah, they do not, at least so far. They may be, though, if Sting and Rogue learn about the graveyard(provided they remain members of Sabertooth, which is unlikely).