If you preach a set of principles and then backtrack on them when it's convenient for you, you're a hypocrite and have no integrity. If you do this on purpose, to deceive people, and there's money involved then you arrived at the definition of fraud, +- some extra words.
https://news.bitcoin.com/parity-calls-for-ethereum-hard-fork...
Simple as that, it's decentralized, that's the whole point, you fundamentally can't tell people which fork to believe, people use whatever fork they want. And the people mostly wanted the fork with their money in the DAO preserved. People who wanted the unaltered chain stayed there, no big deal.
A hacker minted free Bitcoin in 2010 and the chain forked to remove that transaction. But nobody's talking about that being a scam. How is the Dao hack any different?