If the rumours are true, yeh you can blow over after gargling mouthwash but nobody would suspect you of being under the influence.....
I really didn't want to buy into this discussion at all but let's not hang the crew member concerned until everything is out in the open. Perhaps someone smelt alcohol and reported that. We're all aware that there can be many things that cause that smell (including rapid weight loss- see the BA pilot example from a couple of years back for that little gem) and not all of them mean you're under the influence of alcohol.
There is nothing I've read in this report that it was the actions of the crew member that resulted in the report going in and to suggest that it was at this early stage isn't exactly fair. You may turn out to be correct, but your gut call on the information available is not a fair one.
Renurrp said it better... whilst I was typing my response.