I'm not so quick to label him an asshole. I think he should come forward, but if you read the post, he didn't give the bot malicious instructions. He was trying to contribute to science. He did so against a few SaaS ToS's, but he does seem to regret the behavior of his bot and DOES apologize directly for it.
"...if I harmed you". Conditional apologies like that are usually bullshit, and in this case it's especially ridiculous because the victim already explicitly laid out the harms in a widely reported blog post.
Also, telling a bot to update itself unsupervised and giving it wide internet access is itself a negligent act (in the legal sense) if not outright malicious.
They didn't even apologize. (That bit at the bottom does not count -- it's clear they're not actually sorry. They just want the mess to go away.)