Maybe I missed a step. They talk about how site operators with objectionable content know they are not welcome and maybe leave, but don't mention how the site operator would know their site has been marked.
That step is implicit in "organizations that have received funding over the years include the Anti-Defamation League, the Southern Poverty Law Center, local chapters of the NAACP, the National Bail Fund Network, the American Immigration Council, the Trevor Project."
Someone who doesn't like those organizations is incentivized to not use NSFN to host sites that those organizations would oppose.
That sorta works, but it assumes they read the FAQ. If that's functionally required for using the service at all, it might be more reasonable, but I wouldn't take it for granted.
Wondering about that too. The last paragraph can I think be read as suggesting such sites are proactively notified by NFS:
> It helps the people who operate repugnant sites understand that they are here because we tolerate them... barely... not because we endorse them or their views. It also does a pretty decent job of further thinning out the number of such sites, as a fair number of people who run them only believe in free speech when they're the ones talking.