I truly, truly believe that as long as people like you have any future stake in the matter, then exponentially more human suffering will occur than if you and your like did not have a say in the matter. Now that’s a lofty claim: am I insinuating that you and your ilk are indirectly responsible for hundreds of thousands of unnecessary deaths?
Whereas by purchasing of drugs punters are not supporting the organisations that are killing your fellow citizens in uniform?
You and your fellow punters by your purchase of drugs are not supporting organisations in various parts of the world that rule vulnerable populations with an iron rod by use of terror and intimidation, including one that will not countenance any education of girls -- backing that policy up by means of murder and acid throwing, and that insists that boys will only be exposed to the Koran by way of schooling.
Your drug purchases may support a regime that does not allow women to walk in public unless cloaked in a burqa and restricts access to healthcare including maternity care with the result that there is a high maternal mortality rate. Your drug purchases may support people under whose benign rule little girls are married off to grown men who have every expectation of consummating those marriages, and expect their child wives to bear them children as soon as they are physically able. Bother you much?
I wonder how you as a father of two girls (iirc) can choose to use your disposable income for cocaine or ecstasy, or philosophically support the trade in other drugs when you know the human cost on both producing end and consuming end, and in particular the cost to women and girls.
We live in the real world as it exists right now, and as of today you are part of the problem.
Incidentally, thank you for the warning about the song.
The moral is....?
OK I can't resist spelling it out 
Now that I know what a problem it is I will avoid it.
It seems to that me your mention of something that gets inside your head and can't be got rid of and therefore would be best avoided is very appropriate for the particular subject under discussion.