Ah cool, just wanted to make sure we were on the same page.
For context, this was in my second playthrough.
So, I did see that message, and I DID hit the alert button, but nothing happened?
For reference I:
<saw the message>
<spammed alert about twenty times>
<mined another hash to see if the mysterious outsider would say anything again (they did not)>
<game continued on as it did in my first playthrough>
Maybe a glitch?
On the too cryptic note, I think all you really need to do here is to have messages hidden in EVERY cryptic hash, not just some.
I actually played the game through twice, and the first time I checked the hash a few times but coincidentally none of the times I checked it did I see a message, so I figured 'eh, guess I was wrong about that'.
Second time I checked the hash literally every time, but I only did that because I'd already failed the first playthrough and was looking really hard for something I'd missed.