Re: 7X03 A Town Called Mercy (Grading/Discussion) (SPOILERS!)
I thought the whole point was that, as far as the Whoniverse is concerned, whilst Lis has died, Sarah Jane is presumed to go on.
Indeed, Moffat has said that he's refusing to write a death in for Sarah Jane and that as far as anyone is concerned, she's still having adventures that just won't be televised anymore.
"Internet message boards aren't as funny today as they were ten years ago. I've stopped reading new posts." -The Simpsons 20th anniversary special.