It’s not displayed on quokk.au. It’s the rationale discourse box in the sidebar, it’s a checkbox in the settings, same with the preset trump/musk filters.

As for why?:

• Reduce visual clutter: it’s an element that realistically a user will use once, it doesn’t need to always be there.
• We’re an anarchist server: I’d like to trust most people to be able to make their own informed decisions and be avoiding any alt-right pipelinens on principle.