I think we have to be careful on believing the spin that the media put on these things.
Now first off, let me say I do not condone what he has done in any way, shape or form.
The reason the drink/fly limit is 20mg is because this is the lowest recordable level of alcohol in the blood without even consuming any. Any amount of alcohol will push you over the limit – period. But the title was a tad overdramatic to say the least, was he drunk? Absolutely not. Was it potentially catastrophic? Absolutely not. 4 x the legal drink/fly limit will take him to 80mg, this is the legal drink/drive limit in the uk, not above it. If you have had 1 pint do you feel drunk? I somehow doubt it. It is very over dramatic just to make a story. I do however, think the guy needs shooting. 27vet is right, if you are flying the next day just lay off the alcohol.
Also you cannot be prosecuted on the road for failing a breath test either, you have to have a blood test as well.
That is objectively and rationally put. I suppose we cannot ignore the potential for greater hazard for a pilot with excess alcohol in his system than for a motorist.