Helsinki (Finland) has a strict 'no drink within 12 hours of flying' ......
It doesn't matter if you have no alcohol in your blood when you report, if someone can prove you did consume alcohol within 12 hours you are guilty.
That person could be one your passengers, an airport employee etc who saw you in a bar drinking within 12 hours ....
Its just not worth your licence ....... stick to the rules, no one will ever give you any mercy with ref. flying and drinking, and you owe it to your passengers ....
Would you go for an operation if you knew the surgeon had been drinking within 12 hours ???