I won't go so far as to say this makes him a "scammer," but its pretty dishonest behavior.
I have not used the word "scam" in my official complaint on his trust page. To me, scammer can mean someone who operates in a dishonest or deceptive way. But not everyone believes that, so I just stated what happened and let people come to their own conclusions.
There should really be an open discussion as to whether or not this type of behavior is an acceptable practice for a DT1 member, and as shown by the fact that TECSHARE is now back at -1, its safe to say that the community agrees that its not.
The community will decide overall. If some stop trusting me because I called out a cheater, more people will cheat. If not, it should be a warning to others wanting to trade trust that we will not tolerate it.