I spoke of LSD with the implication that LSD is much worse than marijuana in terms of lasting effects (flashbacks in this case). I used it only to provide some frame of reference in the real argument, which is over marijuana. You went after my mentioning LSD despite weed being the topic here. That's a straw man, if you care about being syntactically correct.
Find me the story of somebody who was "lost" in LSD and I'll respond to it. Right now you're spreading FUD. There is proof of LSD flashback. There is no proof of people getting "lost" in trips. There certainly is proof of LSD aggravating people with mental instability, but instability exists without drugs.
You probably already know this, but just to clarify, LSD flashbacks are not biological, but psychological, similar to Vietnam flashbacks or other PTSD inducing events.
Find me the story of somebody who was "lost" in LSD and I'll respond to it. Right now you're spreading FUD. There is proof of LSD flashback. There is no proof of people getting "lost" in trips. There certainly is proof of LSD aggravating people with mental instability, but instability exists without drugs.