Yeah it's an interesting read. Some of it definitely makes sense however I'm still rather skeptical. The guy's rationale for not trying to change history is flawed though. If you have the ability to change one facet of history then couldn't you technically change all of it practically? He mentions not wanting to prevent Pearl Harbor from occuring because then we wouldn't have entered the war and years later had the impetus for creating the A-bomb, and Germany may have beaten us to it and used it. But couldn't you just go and then prevent those German scientists from creating it as well? For that matter, couldn't you go back and just assassinate Hitler too? I'm sorry I just have a hard time believing that the people of the future have the ability to travel back in time, and the best they can do is anonymously post on the internet a bunch of selective info. And considering what a major event 9-11 was to our countries history I think he could've made more direct referencing to it than just supposed "hints". As for his physics theories that came true, so much of that stuff was already theorized, though at the time unproven, for quite some time.
Whoever he is, or was, he definitely is smart and knows some of what he is talking about, no doubt. I just would hope that if we were ever graced with the presence of people from the future, they wouldn't just post on a fucking public internet forum and find some better way to spread their word lol At least, in some way that might give people a bit more to go on and actually have reason to believe what he has to say.