the single biggest cause of ill health amongst drug users .... is the fact that it is illegal and is therefore done in a surreptitious manner with impure products.
You can't suddenly try and make a correlation between crime in columbia and a sugguestion to try and at least get addicts into safer environments than the streets.... a safer environment not just for them but for the non drug using public as well, as anything to try and reduce the number of discarded needles for children to pick up has to be a bonus !
For me, the attitude that something is illegal and therefore we should never do anything to assist those that partake in it, is extremely naive and almost child like.
It simply does not address the complexties of life and the society we live in - nor provide a solution.
People are taking drugs regardless of the law ... and even if we turn the majority of the UK into a prison, drug taking will still take place - drug use in our prisons is rife and shows you exactly how hopless a policy of 'getting tougher' is.
If drug users are going to carry on whether you like it or not - it is far better to take the mature and pragmatic attitude that whilst I might not agree with it, I am going to make sure that I minimise the health, crime and social risks to the users and the general public as possible.
Or we could just do the old 'hear no evil, see no evil ..... ', personaly I prefer not to appear like a chimp with his hands over his ears
ps .... the don't grow herion in columbia

cocaine can be injected ... but it is more commonly snorted .. or smoked in crack form.
( I think you ment to mention Turkey and Afghanistan instead where most of the herion comes from ... and therefore where most of the drugs that would potentially be injected in these 'rooms'

)