I don't think hackers and scammers are doing any thing wrong because we can see in past that when bitcoin was not in existence then still at that time hackers were available and hacking were going small to big big , so how can we blame with the cryptocurrency .
Here this is big truth in the cryptocurrency industries that market is much secured with mutual support of the investors Because technology that uses in the cryptocurrency is really better secured than what the banks system have in real life .
But still many scam platforms makes the bitcoin and another altcoins more scammy look Instead to show reality and reliability  by making Ponzi sites and spreading the investment plan with the attractive returns but in actual they scam into big amount .