Will I am agree with you but I have one idea . Cant we do something by which users can check only desired thread . Like I want to buy some articles and for that I have to check all content section which contains WTS , FREE WTT , WTB . If we can make any button or option buy which we can check only WTS threads in that section than it will be easy to surf and check everything .
Like I visited content section and selected WTS option than I will only see WTS thread where users want to sell articles . I hope this is fine option .
It is just my thinking and if it is wrong than I am really sorry for that .