Trust can only be built up over time. This is especially true for this sort of internet association.
I just joined the Duchy and therefore I can not expect that anyone just suddenly "trusts" me. It will take a long period of involvement for people to have even the slightest idea of the type of person you are.
It helps of course if there is some sort of conflict situation (or situation in which you help someone) whereby people can judge you on your actions.
