So what if you get some random -rep ? No support on steamtrades?

just checked steamtrades and got -rep from some complete stranger that calls me out as a scammer lol :D

i dont even know him except i saw a thread by UZuhl (a actually known trader) where the same happened, by the same person.

Why there is no possibility to report someone on steamtrades directly, or open a support ticket there? :(