There’s this to go by, which is quoted within a
lengthy thread on the matter:
<…>
And I want to insist on my suggestion regarding trust: guest should see some trust.
The main reason that I went for this solution rather than forcing custom lists is that I would like to show some trust indicator to guests. But before doing that, I want to see whether these modifications can actually be made to work. If not, then I may go to the force-custom-lists solution, and that's incompatible with guests seeing any trust indicators.
Things stand as they were at the time of the above comment, and perhaps it could be reviewed by now.
Although people that navegate the forum without being logged-in may not really know how the Trust System works, seeing the Trust indicator values may be good enough to alert the outside reader (DT view). Displaying a visual cue to incentive the reader to create an account / log in could be interesting in addition, pointing to the need to read the feedback in order to properly asses the Trust ratings being viewed.