For past 15 years gurochan was down many times and always returned. I don't think it can be sinked forever.
And if by any means it die forever then we can migrate to more safe and complex place like lolicit.
Some trolls can't understand that they can't do anything with our community. People won't easily change their tastes and fetishes because someone say something. Gurochan is small (but dear) board for art mostly from other places like pixiv.
On pixiv is about 1800 artists wich generated more than 5000 pictures every week according to my statistic of downloads. I even can live with Japan censorship.