That's because it doesn't blacklist words which are commonly used in English without them being technical terms, nor doesn't it whitelist terms which are topics of interest. There's also no difference being made between referring to Wikipedia and being an expert about Wikipedia. If you regularly reference to Wikipedia (something I do) you then become an expert on the topic "wikipedia". As an example, check the expert topics from user tptacek [1] ("security, argument, fact, hn, thread, software, comment, story, google, sense").

The probable mood was rather... entertaining.

The notion this can be used to find sockpuppets or throwaways does not surprise me. Without sufficient effort you still use certain words, in certain order, consistently. Such can even be used to check out what your native language is. So if you are e.g. a blackhat who wrote ransomware it makes sense to have someone who never wrote on the internet to paraphrase or deal with the communication, or perhaps use tools such as translators.

Also, if you use delay (e.g. delay 10) it is going to appear on HN after you wrote it meaning it could appear in the next hour despite being written in the previous.

Despite the above, I did find this an interesting project; I just very much doubt its accuracy and usefulness.

[1] https://hnprofile.com/author_profiles?utf8=%E2%9C%93&search=...