well, i might agree that the drugs laws in netherlands are shitty, however i have to say the ones in the UK are shittier (basically it's "illegal drugs are bad mkay, legal drugs are good *). i suspect a properly administrated set of drugs laws on the model of the netherlands would work best, but then a properly administrated set of laws about anything has a high chance of being better than what we usually have to put up with.
* we're talking about valium, methodone, all sorts of steroids and downers, it's shocking what you can put your body through legally and they don't tell you the risks!