Admittedly it is harder to trust individuals with relatively low participation rate, as they have less to lose for their potential disappearance.  Hero members and above have a lot more time to lose by poor behavior since it takes a long time to build that up, so they're less likely to do risk it.  They'll still do it, just less incentive to do so.  Totally new members are the most distrusted since the time it takes to make a new account is negligible.  Only way to overcome these prejudices is to stick around; before that, you can get by easily with a proper attitude and presentation, e.g. empathy towards others like kindness and manners, proper usage of the accepted language (English in most cases), making good on promises.  The prejudice will still be there but people will be willing to overlook it.