Getting a negative trust will not stop you from gaining knowledge and learning more through this forum, just reducing your chances of getting a profit.
If you are planning to make some money, you have to read the rules and educate yourself about things that may be considered negative indicators of DT forum members, such as selling accounts, participation in a Bumping campaign, ...etc.
If you do not care about this, you are not entitled to demand the removal of negative trust.
In short, you should know what is the reason of that trust if it is logical, Just go on and learn more. Life is not dependent on signatures campaigns.