Taking a rare for an artwork REALLY can't be called scamming.To be honest, I felt like I was scamming him with just a rare for my new sig. And @dugadu8 , @newsbuff created the Mass Sharder and I have used it many times(not recently though), so I completely trust that it works and is very safe if so is said. Your problem in the picture seems to be not having selected any runes to sacrifice.
The runes for art aren't what I'm referring to. That is actually a pretty cool trade. I remember signatures for exotics a long time ago.
While a rare for the artwork is a great trade, we was pretending he was new and that he had no runes when asking for donations (I believe).
Someone I've never seen in game is new to me. But man, I have a very laid back positioning regarding these things which is "I don't care, Pox needs players"(there's probably only one player I don't think should come to Pox anymore, and that's because the person has done some extreme stuff). As long a he isn't truly scamming people I'm adept of "forgive and forget"; and I'm just going by your words here as I don't really know if he has done anything.