I think the more likely threat is for content hosting companies like nostr.build to start posting banner ads &/or trackers over everyone's memes. As far as state level attacks It would be far more difficult to censor if we all just hosted on our own domains. Kind of like removing one raccoon in your attic versus an entire termite infestation. A custom domain option from companies like @nostr.build would be something worth paying for once people realize the value in "owning the path" to their content. It would also protect consumers from outrageous rate hikes because they would be able to migrate their content and keep past notes true.
Example: