I really don’t know and I’m totally happy when corrected… but WP Discourse doesn’t override commenting system, it ”just” shows topics of Discourse as comments.
Original commenting system is still there and if you let bots use it via SSH, direct urls, what ever path, it will happend. Similar situation when we hide something using CSS. It doesn’t remove anything but from screen. Of course WP Discourse is not that simple, but the principle is same’ish.
Or I am totally lost and quite soon we will hear how things are really 