Hi @anon62122146,
I would say, even if it is possible in principle to parse all the documents in Sci-Hub to extract citation data, you cannot republish them on the Web in the public domain (e.g. in CC0) since they are copyrighted material.
What I4OC is pushing for is to have a freely open citation graph which is entirely legal, and the path followed in the past year was to convince publishers that already deposited their citation data in Crossref to release them to the public in a totally free a legal way, making them accessible by means of the Crossref API – see my previous comment to @d_r.
