is it possible to exclude yourself from your own trust list?
No, I just tried it. ~suchmoon disappeared after "Update" and nothing changed. No guild membership for me or Lauda I guess.
I was genuinely curious about this...
What is the logical outcome of excluding yourself in the trust system?
Well, it would mean that your own judgment is not to be trusted, which means that you don't recognize your own exclusion, which is probably why it disappeared...?