I think it's hard because the bullying has been done and the law is already in their favor. This isn't a grey area case of "is it legal or not" it's a case where the IA broke the already established rules. They're fighting upstream.

Despite its importance I don't think the Internet Archive is a common household name on the level of Wikipedia and I don't think any sort of boycott would have the legs (I would love to be wrong about this).