The thief did not appear to be too sophisticated. Obviously sophisticated enough to pull off the twitter hack, but we don't really know how much sophistication that required just yet (the exploit may have been trivial). But, they didn't disseminate this message anywhere other than twitter? That seems very shortsighted.

They used different approaches on different twitter accounts, some suggested a coin return, others suggested a charitable donation match, etc. But, they all used the same bitcoin address. If they were sophisticated, they would have used a different bitcoin address for each to evaluate the more profitable messages for a future scam.