They don't need to shut off Anubis, they just need to configure it beyond the defaults. If they turned on the meta-refresh based challenge then all browsers could access it while still keeping most of the bots away. But few people ever configure these things and just accept the broken defaults.
With the current broken default config my browser can't even run the JS challenge due to it using unsupported bleeding edge JS features.
With the current broken default config my browser can't even run the JS challenge due to it using unsupported bleeding edge JS features.