TBH I don't know about that case. But a dice site is not an obvious scam until proved otherwise. Did he promote it even after it was an obvious a proven scam? I see he updated a previous positive trust to neutral after the scam was found.
On the other hand anything that "guarantees" always doubling your coins is an obvious scam.
To make it short: promoting a known/obvious scam deserves negative trust. Therefore I'm adding negative trust to you now. If you can prove without any doubts shorena was promoting that dice site after the scam was proved above reasonable doubt then I'll add negative trust to him too. Sounds fair?
I feel Shorena is quite within his rights to leave negative trust, and newer members of the forum should be warned about sites like this so I applaud him ( and EcuaMobi for the above quoted ref).
There is always a loser on ponzi and "doubling" sites. While it is permitted to advertise such sites here on the forum, why is it surprising that people that care about integrity give you negative feedback?