Where some users haven't understant the system of adding someone on trust list. Having a button on each members profile can help them to add someone on their trust list easily IMO.
If they can’t understand it, why would they bother to use it? Would it be illogical if we have such button for everyone to just push/click it without even understanding what it’s purpose? Since they don’t know exactly what is it, they will just be founding on what the user is saying and just click that button – it would be a
like button for them.
Instead of button, in the trust settings; when you click
Update it will pop-up something like “You have selected/inputted with similar names, are you sure these are the real users you want to put in your trust list?”, then names of possible similar names will appear and people can just click the right person.
EDIT:
It very well could wind up being misused/abused this way. In reality though the current system can/does get used this way, it's just a little more difficult to do.
Exactly, it might be the reason why it is designed that way, to make it a little more difficult for misused/abused.