Brainwallets with human generated passphrases are a bad idea. Doesn't matter if it's offline or online they are just a bad idea period.
This, 1000X this. Brain wallets should never be used, humans suck at coming up with something a computer can't guess.
huh? The distinction was just made that brainwallets with
human generated passphrases shouldn't be used,
NOT that brainwallets of any sort are unsafe. The whole point is that you can use a brainwallet with a
computer
generated passphrase.
Even certain human generated passphrases
might be safe, but the issue is that the entropy cannot be measured
so you are better off letting the computer do it.