I recently flagged this answer as "not an answer" because it no longer is one - it had been an incorrect answer at first, but was edited effectively out of existence by the user who posted it "to preserve the comment discussion":
(This answer was wrong... so I've edited it out... I'm leaving this here to preserve the comment discussion)
Was I wrong to flag the answer? I haven't seen that justification for leaving a stub instead of simply deleting before [I haven't been active on SO for long], but I can kind of see the user's point, as the comments may be helpful to somebody.