Obviously, you either midread both of my responses or I didn't make clear what I was saying. I meant overall, drugs, legal and illegal, are usually, in comparison to the other means listed to induce hallucination (ie...sleep/oxygen deprivation, fever), the safest and easiest route. I already stated that, 1) meditation/ecstatic trance to induce a state usually requires large amounts of training and, 2) spiking of the body's temp has proven dangers.
As far as meditation being dangerous, I personally do not find it to be as I have been a practitioner since I was 19 (I'm 32 now) nor did I ever state that I felt it to be dangerous. But as an aside, according some some, there are practices in meditation (kundalini rising) that have been alleged to be dangerous, but I was not including thoses views here.