HwKeeper
The ability to disable auto-translation globally without providing a translation at all destroys the very essence of this feature — it can already be turned off simply by pressing the manual translation button.
The problem here is different: if the author believes their topic isn't needed on the .net (English-language) domain and wants to restrict their thread to the Russian-speaking audience — that's another matter. Such a checkbox could be added, and the thread would simply not be displayed to those who don't know Russian, overall.
The feature was made for the convenience of those who don't know Russian and works better than just pasting the text into Google Translate, since it provides context, topic, and message section, as well as a jargon dictionary for different versions of Heroes.
Otherwise, a person who doesn't know Russian would be left with the option of pasting the text into Google Translate or a similar translator. That is, the translation process would still happen, just less conveniently and with even lower quality.
Here we need to decide: what are we trying to achieve? What problem are we solving?