It occurs to me that George R.R. Martin might well be against fanfic, but nevertheless he has done pretty much the one thing guaranteed to breed it, complete with fic-writers who have never read the books or even heard about GRRM or his opinions pro or contra.
A brief glance at the Imdb page for Game of Thrones has convinced me that there will be Eddard Stark slash soon enough. After all, it is a truth universally acknowledge that Sean Bean + leather pants* = fangirls. Just saying.
*It's a pseudo-medieval fantasy world, I'll be very surprised if there is an absence of leather pants.
(And fortunately I've managed to restrain myself from leaving a snarky comment to that effect on the GRRRRR-ing fellow's journal...)