@ eightcylinders: . The fact is the crypto currency is property. Taking or destroying someone elses's property is definitely a crime. I am not saying that destroying someone's crypto currency can be successfully argued in court. We live in a world where it is successfully argued that brazen and obvious criminals are innocent and that innocent people are criminals all day every day. By your logic murder is legal because the glove did not fit.
I agree with your point that it is probably impossible to identify all of the criminals, shysters, fraudsters, aiders and abetter, etc. in this scam so maybe its a moot point.
However, you keep saying that forking the blockchain and blacklisting coins in the process would "take or destroy" someone's property. You are conflating "taking or destroying" of certain XPY coins (the private keys proving ownership of a coin) with taking or destroying one's ability to use and commercially exploit that same. Conversion/theft is only concerned with the former, not the latter.
Crooks eating their own. Greed is a powerful force to a scam artist. Getting rid of one crook's coins makes the coins of other crooks more valuable to them. It's all about the pump. The pump. The pump. It's all about the dump. The dump. The dump.