

they’ll block all servers that host Mastodon
This will be a never-ending game of whack-a-mole.
Like how China tries to block VPNs that get around their firewall. There’s always another VPN that China hasn’t blocked yet, and there’ll always be another fediverse server that any other authoritarian regime hasn’t blocked yet.
There are many non-local scenarios that can cause CSS to not load. The host providing the CSS could be down, for example. The CSS could be malformed or broken in some way, for another.
It’s likely a local problem, but it is not always a local problem.