Unfortunately there is no social context for halucinogens. This is where much of the damage comes. Someone sitting at home take a big dose of some mystery drug, freaks out and attacks a train. Much of this can be prevented.
I notice reading through erowid that the vast bulk of bad trips involve taking way too much. "My friend got this stuff he called DoC on the internet. We made a couple small line and railed it up. Thats when the trouble began"
Wrong chemcial, bad chemical, too much chemical, taking chemical in wrong place and cops is the cause behind 98% of the bad experiences.
It would be nice if there were places people could go to recieve pure substances in proper doses and take them in a safe environment where trained people were available in case there was an issue. In circumstances like this the harm would be negligable. But no, instead we get some kids snorting 200mg of DPT in the local park then crashing their car as they try to drive to safety when chased by the devil.
The environment we have created is toxic, the drugs not so much.
Many of these drugs can cause a state which would be recognized as a religious experience. As such they should be protected under the constitution as religious behaviour. This has been done on a limited scale with the native american church, peyote way, church of the light and others. We need a new church which embraces LSD, Mescaline, 2C-B, 2C-E, Mushrooms, MDMA, MDA, DMT, DPT, DOC and others as their sacraments.