I found out a recent function on the forum that i think is similar to Bitcoin talk trust list. It enables one to add and remove a buddy( as the name imply, A friend). To add/remove click on the person Name/profile and you would find add to buddy list and it would change to remove from buddy list.
To check buddy list
Click on your profile>modify profile>buddy/ignore list>edit buddy list.
Currently i can't really use the ignore. I guess its only available to specific badges.