My account is hacked
Change your password (uniq and strong password)
Change the password on the email you have associated with the account.
Scan your PC for malware.
When you are sure that you are in 100% of your account, then contact the users who gave your negative trust.
They did the right thing by giving your account negative trust, they proberly prevented people from being scammed.
Don't take it personal, it is not YOU who got negative trust it is your account.
I am sure that malevolent, Tomatocage and Blaater will remove the negative rating if you can convinces them that you are in 100% control of your account again.