If I can do it by myself having the current rank I have then I can save a lot of works except waiting for someone else come to see the post and do the tagging job.
Everyone can leave trust feedback, just click on the trust link on their profile page. The difference is that it will not be visible by default. Someone has to go to Untrusted feedback and click 'show ratings' to see it if you are not on their trust network. The people on Default Trust's rating are seen by everyone unless they have been excluded from someone's trust network.
This thread explains it further:
https://bitcointalk.org/index.php?topic=211858.0