the trust in your profile rating. So for example Marcotheminer you would not be able to join as your trust is a -4
-8 for me ^^
Which illustrates my question: Different people see different things depending on who they decide to trust. By default, users trust an account called 'DefaultTrust', which trusts a list of people selected by the forums administration. However, there is no central authority on who is trustworthy and who isn't as some of the biggest recent losses of BTC were due to people in this DefaultTrust list.