While I agree with you, I think it depends on what the messages actually contain. If it's something harmless like messages about Bitcoin or about Bitcointalk, basically anything that's nowhere near it being sensitive information(which I heavily doubt Satoshi ever gave sensitive information about himself), then I think it should maybe be fine? It's a no for me with the IPs though, even though I'm 100% certain that Satoshi used Tor/a proxy/a vpn.