There is something called trust list here if you are not using any customized one than you are on default one were all the DT members trust count as trustworthy feedback which could be visible on the trust wall. Other feedbacks lay under the untrustworthy feedback list, means the people whom you don't trust. It would not show until you click on the "Show ratings" text there.

One can use trust system to show how trustworthy you feel a specific user is. You can put on your own trust rating as negative, positive or neutral with a comment.

Yes, people use this site for buying and selling but, all the trust rating's here does not imply actual trades but could also point to personal disagreements so be sure to check them manually by clicking on the word "trust".