JKR said in her recent interview that she just cavalierly killed off Harry's grandparents, 'cause they were extraneous to the story. (She wanted her protagonist to be all alone in the world, with only the 'orrible Dursleys looking after him.)
She aspires to be Tim, I think.
Tim kills people off for effect. This was just expediency
I may be thinking of the interview, actually.
Holy God, Trudes. What's that, the third today? Fourth? You're a slut slut.
Third! It was a slut hat trick!
awards Trudy the slut hat
Huh. Just how is a hat supposed to be low-cut?