So I'm no crypto-currency whiz, but the gist of this is that a hacker basically stole a page from the Road Runner and at the last minute swapped the road sign that pointed the ICO buyers where to send their money right? The equivalent would be me going to Wal-Mart and standing in front of the cashier and telling the customer how much they owed me. Neat. 
Figuratively that. It is the equivalent of hacking into someone's GoFundMe page and substituting your own paypal address. It is the equivalent of intercepting the broadcast of the Jerry Lewis Telethon and overlaying their 1800 number with your own. Bizarrely enough, this problem has already been solved but since ICOs are basically a bunch of punk kids with a whitepaper raking in millions of dollars, it wasn't. I mean, I own like a dozen .eth addresses and the most they cost me was $3 each.