It's a static blog so I'm guessing no administrative page? Either way, when interacting with the blog, he uses Tails which means all outside connections go thro

It's a static blog so I'm guessing no administrative page? Either way, when interacting with the blog, he uses Tails which means all outside connections go through Tor. And he explicitly writes about not creating a GMail account because Google requires phone verification. But even if they did all that, they'd learn that the author of Untraceableblog.com uses Tor which is what he wrote he does.