We're accountable through differing channels:-
Civil law (improbable, resultant damage would have to be demonstrated), criminal law (improbable), Professional Bodies (Improbable but this latest ruling makes that less so), Employment Contract Law (Improbable, but employers are getting more twitched about twitter etc of late.)
What's interesting, is the differing channels of accountability often contradict each other..... eg the ambulance driver who was contracted to work
x hours, when he crashed, he was found to be committing a criminal offence.
It's a minefield...... which is why we (The NHS) spend 10% on legal costs