If censorship is possible it will happen. If enough relays/clients decide they dont like you, you r out and even pen relay wont help you cos your notes wont reach many.
Discussion
You do realize there are *hundreds* of relays that are geopolitically diverse already right? Do you really think they'll *all* censor you? Compare that to Twitter where if one person decides they don't like you, you're gone. As for Nostr, you can run your own relay and everyone can reconnect with you. Big, big difference between the two.
How will new followers discover me if big relays block me? My posts wont reach many people. Its like shaddow ban of birdapp.
And clients can censor just as well and there are fewer of them.
Again I say, there are *hundreds* of relays. How many of them have blocked you? Compare that to Twitter or Facebook where all you have to do is disagree with the government narrative and you're gone. There's no comparison. You're pretending a problem *could* exist here that doesn't exist here, and if it did, you could connect to other relays that don't censor. You have a choice, and that makes all the difference.
If someone posts CP, u think relays will want to transmit such content?