What an idiotic statement by Manson. Apart from being easily used as a lyrics theme, drugs can do little to promote the creative process.
I kinda disagree with that... I mean a lot of GnR's best songs were written under the influence...Coma, Dust N Bones, Mr Brownstone, Nightrain (sort of) to name four of their best.
Lots of other great music has been written under the influence as well...I think that's a fairly naive statement.