OK, I tried to distrust ~DefaultTrust previously with the \~DefaultTrust but it didn't look to have worked. How do I ~ both ~DefaultTrust and ~~DefaultTrust ??
You've got it the other way 'round:
"If you want to
trust someone whose name begins with a tilde, prefix their name with a backslash."
It's as easy as
~~DefaultTrust
~~~DefaultTrust
As stupid as it looks.