All decentralized file systems are doomed:
https://bitcointalk.org/index.php?topic=1344997.msg13730325#msg13730325
https://bitcointalk.org/index.php?topic=1340057.msg13670558#msg13670558
https://bitcointalk.org/index.php?topic=1340057.msg13783053#msg13783053
Storj guy here. All of the actor vectors you described are addressed in the our whitepaper or a blog post. https://bitcointalk.org/index.php?topic=1344997.msg13730325#msg13730325
https://bitcointalk.org/index.php?topic=1340057.msg13670558#msg13670558
https://bitcointalk.org/index.php?topic=1340057.msg13783053#msg13783053
1) Sybil - Bonds and unique pieces
2) Illegal content - Greylists
3) Bandwidth vs storage - pay for both
But TPTB is a genius and you are an imbecile. He is so smart that he can determine your cryptocurrency is broken, worthless, and doomed without even researching it or reading the whitepaper.
I feel sorry for all of the people that consider everything he has to say as the gospel, because he will certainly claim he is correct and never wrong.. apparently without even doing the proper research.