I feel that certain groups of people are a bit flippant about drug use, and seem eager to promote them as these great things.
As an example of why we should still remain vigilant - studies have shown MDMA users to literally have shrunken bits of their brain. http://www.maps.org/news/media/2462-media-reports-of-ecstasy...
I remain cautious of people that promote these things - we should know about the side effects so we can make informed decisions.
Overall, I think it's good to open up laws to allow usage of this, but let's not forget the people who suffer from or may be prone to suffer from drug abuse, and maybe think twice before promoting these things to friends.