Unlike all those 100% convinced truthers here and there, I wouldn't rule out that Craig is (part of the team) Satoshi, but I can not imagine that Craig is identical to the person who wrote on bitcointalk. Can you?
Craig has stated that their system for posting was that Craig would write a comment as a draft and Dave would edit and post it. He describes Dave as a "people person," able to make others understand whereas he could usually not.
Also, a comparison closer in time to his Bitcointalk style would be his InfoSec mailing list style and his articles for GIAC/SANS. He is still recognizble for some Craigisms and confrontation, but not the typos, low-effort, and abstruseness. You can also see Dave's writing style on the InfoSec list. Here's a
paper they co-authored in late 2008 about whether hard drives need to be wiped with multiple passes, which also mentions security as an economic function.
Further, think of the familiar pattern of how a redditor's writing can become progressively aggressive or even unhinged over the months/years. It can be desperation or just consternation with how people are not getting their message. Sometimes it's just social media addiction and they recover after some time away.
Wright seems just from his demeanor to have beem through some personal hell around 2015. It's public record that he was hounded by the ATO, and he claims he was extorted and doxxed by Phil Wilson and that his daughter was threatened. Those who have seen him at conferences know he travels with bodyguards. Since late 2015 he's gradually calmed down and looked healthier, despite the continuing dickish streak and occasional bouts of unhingedness. His TFoB presentation a year ago and the video I linked above where he talks to Chinese miners are very different. In the former he constantly trips over his words, seems nervous and really pissed off, and is often all over the place in what he says despite some gems. In the latter, recorded a few days ago, he speaks clear coherent sentences with very little stumbling and is even eloquent. As I mentioned, highly variable.
See his interviews with
@reina or the BCH Boys for him sounding a lot more level-headed and calm as well, where he makes a lot more coherent points. I have seen the dynamic in text as well: sometimes typo-filled screeds that seem to make no sense, and other times much more carefully laid out text that says something clear step by step.
All this points more to personality oddities than anything else. I can see how being secretly Satoshi could take a toll on a person (as, of course, could being secretly a fraud). In
The Satoshi Affair I believe we see a lot of the man laid bare, good and bad. It's a must-read for anyone interested in getting to the bottom of this.
@go1111111 To answer a key point in your post I was thinking about, Craig states selling one side of the chain and then attacking it is illegal. Not sure which law he thinks it breaks; might be that killing the chain is allowed if you are claiming it is illegitimate and/or a threat, but that transacting on it first would estop you from making that claim.