I explicitly said
> it becomes dangerous if they can preview the results or inspect the other sources
https://blog.cr.yp.to/20140205-entropy.html
You're assuming a hash preimage attack, which would be a complete break of the cryptosystem. (Your link only works on the toy implementation given.)
You're assuming a hash preimage attack, which would be a complete break of the cryptosystem. (Your link only works on the toy implementation given.)