How about hard forking ethereum? J/k. I'd say it's the ethereum platform design and
 community consensus leaders  who'd be held accountable for this and many other shortcomings.

For example, the lack of adoption of the ERC 223 standard, has led to about
10 billion dollars worth ether being lost in transit. If this were a bank, it would get sued.
Ethereum core team needs to push the UX upgrades faster.
Not  acting sooner on the scammy ERC 20 token cesspool is a reflection of the ethereum
 and the larger crypto community, of which we are a part.

Coming back to the post, I'm part of the telegram group where we discuss about this DimonCoin scam
 and how to prevent further scams. Thanks to Thomas Chacko/Joseph Kuruvilla for kickstarting this discussion.