iFixIt is part of quite a nascent movement of makers and fixers. There's a groundswell building up of people who aren't happy with the disposable culture we have here in the west.
This movement may come to nothing, who knows, but it'd be a mistake to write off iFixIt as a bunch of cranks or geeky specialists pursuing a narrow agenda.
I think iFixIt is invaluable in exposing how Apple puts its hardware together, and showing that it again goes against this tide of people wanting to fix, repair and reuse, rather than dispose of. Who knows, maybe Apple might like to tune-in and take onboard some of the criticisms rather than taking such a hard line. Maybe this is why Apple banned them -- they can't handle the truth!