Discrediting someone usually has a goal of pushing customers to another source though. There is no other source of this information, so what would be the point?
Destroy a source of historical documents so that the past can be contested. Sow doubt, confusion, deniability. Hide evidence of past crimes, or inconvenient documents. Plant documents, etc.
Lol, we should create a society of sorts along the lines of the original Bavarian Illuminati. Create a decentralized storage network and archive of knowledge and history. Create a list of important shit that needs to be archived, and delegate standardized chunks (let's say 5 or 10gb each chunk) of data that are to be downloaded by people. Anytime 5 or 10 people have downloaded a chunk, strike it off the list of priority archival and move onto the next chunk. For this to work, needs alot of people though.