[Zaknaf3in]

As a german, who has access to a unused flat of a friend in central Amsterdam - hell yeah it should be legalized.

Because it's just pure fun to lie in a park on a sunny day, surrounded by people smoking weed , having a cool beer or just relaxing - and don't have to fear being treated as a criminal.

There are several ways to think about that whole subject.
The best for human healthiness would be the prohibition of alcohol, tabac and all other drugs as well.
Thing is - humans have always taken drugs, and will go on doing it.

And that being the case, there is no rational reason to ban marihuana, when allowing to drink alcohol or smoke tabac. That's basically because the drug lobbyists (tabac+ alcohol industry) are a much too big factor in politics and economics.
It's just not possible to have an objective view on the tabac/alcohol debate, because the whole thing of excessive burning and blackening the lungs by smoking (inhalate hot smoke of a burning plant - wtf?) or going for a minor or greater toxic dullness by drinking poison in small concentrations, is just too widespread and common and accepted.

In the Netherlands, where marihuana is legal, the numbers of deaths from drinking/smoking tabac still are several times higher than these effecting from smoking weed. Sure, the tabac/weed thing is mixed up - anyhow.
So, the other way around is - if we don't ban the horrible "soft" drugs that are on the market and a huge moneyfountain, why don't use the less dangerous one, too.