Could ISPs throttle or block IPFS content, for instance? The developers should start assuming some extremely aggressive environments, like China, and then go from there, because honestly, we don't know if 20 years from now a lot more governments would see China's censorship as a role model to follow. We're already seeing multiple countries in Europe considering it to stop "extremist content", the IPSs in Canada are now banding together to block pirated content, and the US is probably not going to be too far behind after the repeal of the net neutrality rules. And those are just the "democratic" countries. It's obviously much worse for Middle Eastern or African countries already.
So I just hope the IPFS developers will always try to develop the platform from an extreme resilience point of view.