Prohibition laws existed in the past and had to be abolished because they failed to achieve their objects. They would fail today as well - at least in the countries I have lived in.
In Finland, one can purchase and drink alcohol up to 18% once you're an adult, but hard drinks are off-limit until you're 21. Which is, IMHO, rather idiotic, since at 18 you can get a driver lisence, get married (even earlier with special permission) and go to the army. In other words, you're mature enough to be trusted with an assault rifle but not a bottle of Scotch...
Alcohol is nearly always discussed in the Finnish media, since
a) we have one of the highest per capita consumptions of alcohol in the world

b) the state has, despite our EU membership, a monopoly on most alcohol, keeping the prices sky-high
Those in favour of restrictions appeal for society's responsibilty and public health issues - according to them, if prices were to brought down to the level they are in most EU countries, half of Finland would drink itself to death in a matter of years

Yeah, right...
