I 100% agree, I always thought that even Private Messages were a bad idea.
But no, we're way past "if you don't want it public don't post it." and then wiping our hands and being done. We need to think in a policy kind of way on this.
And again, things are already dangerous -- but ATProto makes them more dangerous. It's something like a chain-of-custody thing. I think the world is collectively safer where the gathering of data like this is less reliable and less verifiable.
ATProto's model makes the building of the proverbial evil Big Brother panopticon thing a LOT easier.