If I understand correctly, SIGHASH_NONE in the
output input signature means that spender of this output doesn't sign his outputs. But doesn't that mean that the spending transaction is by design insecure? E.g. a malicious miner could switch the outputs to his addresses and put a modified version in the block.
Am I missing something? What is SIGHASH_NONE intended for?
Edit: Now I understand why I was confused! The SIGHASH_NONE is in the input signature, not in the output. Somehow I thought it's an attribute of the output, and it didn't make sense to me why the previous spender would be able to decide how the next transaction should be signed.