I didn't say that mushrooms are dangerous (except those horrible panic attacks which is not dangerous but not cool) but I know that Ketamine which we use for anesthesia can be dangerous, also Valium can stop breathing if it's taken intravenous, maybe that is the point why it can be dangerous- injections. It's easy to overdose it. Sometimes people get in hospital because of it. I don't say that that Ketamine which people legally uses is dangerous, I think no.

Thanks for links, I will look at them