tobyp-

Considering what the account was up to I sincerely doubt it was being used without Tor or a VPN.

Despite the British English elsewhere, "could care less" is a particularly American error. I think that's noteworthy.

He's also fairly inconsistent. He occasionally uses -ize endings, e.g. "realize". He also uses some language that is more prevalent in North American English, e.g. "sucks", "gotten", "chump change" and others.

Someone attempting to use British English to obscure their identity would know to use words like "maths" and "flat", as he did; not as many people however are aware that British English doesn't (typically) feature the word "gotten", which he used on multiple occasions. To me, this lends to the theory the BrE was a misdirection.

(As an aside, he's inconsistent in some other things, like "e-mail" versus "email", "TOR" versus "Tor", and "double click" versus "doubleclick".)