Yup, but it's not an easy issue as research, e.g., those in P2P, have shown. A bit like the arms-race in anti-virus. Some examples of manipulation include Jon

Yup, but it's not an easy issue as research, e.g., those in P2P, have shown. A bit like the arms-race in anti-virus. Some examples of manipulation include Jon Skeet on StackOverflow (http://news.ycombinator.com/item?id=784257 http://news.ycombinator.com/item?id=784257). Letting users tune their trust has an advantage (hopefully) because given enough configurability and a good UI, every user will different trust configuration making the old adage true to a great extent; for an attacker, "she can fool all people some of the time, some people all the time but not all people all of the time".