To the people suggesting waking it up: people here frown upon "password has been changed recently" (and I think there is also a message that shows when an old account suddenly becomes active, I saw it under the user commenting in the second post of this thread and under Vod, for instance)
That's simply not true. If you don't do anything dodgy after waking up and and immediately changing email/password (for example asking non-collateral loan, writing in language you never used before etc) then people might think that there is something dodgy going on, but other than that your account will be just fine with that "password/email has been changed recently" message.
but more important, if I log in to set a message it could be hacked in the future and since I cannot sign messages because all the addresses I used are from Coinbase, I would be screwed and not able to recover it.
That doesn't make any sense as using your logic no one should ever log in to bitcointalk in fear of getting hacked, including you with this new account.