Anyone who has a lower alchohol content than the aviation limit would not 'smell' of alchohol or exhibit any 'drunken' tendancies, which means that a malicious accusation sounds fairly likely.
Imagine someone is still groggy having not had their coffee yet and a poor night's sleep, and they've just had a quick rinse in the hotel with some alcohol laced mouthwash.
I am not saying this is what happened as I know nothing about any of this, however, this is a way someone could have appeared mildly drunk and smelt of alcohol, yet been completely OK.
Thank goodness the accused was cleared, it must be a great burden off them, however IMHO you can't go looking for revenge against someone who must be assumed to have had the safety of passengers in mind.
Now if the person who made the accusation was genuinely acting maliciously then it is a different matter, but there is no evidence of this.
How can people be happy to presume the accuser acted with malice but berate the press for similar reporting on the pilot? Pot, kettle, black?