[splintercell]

Your two points:

> What crime, exactly, are you accusing them of committing when everyone agreed to a contract that allowed them to do what they did?

And

> How do I know using another contract won't be labeled theft and rolled back?

What the DAO hack revealed is the following fact, which I learned over the past year:

That there are two kinds of cryptocurrency holders, one group demands immutability at any cost, the other group demands 'reasonable immutability'.

The reason why ETH/ETC split was 90/10 because majority of the Ethereum holders fall in the second group, and majority of the people who fall in the first group holding nothing but bitcoins.