I base my distrust in marijuana on teenagers I knew that started smoking and became mentally lazy, unmotivated, and drop out.
I am not sure what percent of kids have anti-motivational problems but not trivial.
Reactions to a drug is variable and close supervision necessary imho..
Personal belief is there are many types of PTSD, not one solution for all.
Like most I started out believing it was mostly harmless. My distrust of marijuana and marijuana advocates is based on my observations of the scores and scores of people that I know and have known and family members who are users. This is not just teenagers but many older people as well.
We have one close 75 year old female friend who is a heavy user. She has been in so many car accidents relating directly to her abuse of marijuana that she has lost her drivers license on several occasions and now can't get affordable insurance. Interestingly enough despite being "stoned" during every one of her accidents, the police assumed her behavior and bad driving was from old age and not marijuana or drug use and never asked her for a blood sample. She lost her license on because of the frequency of her motor vehicle accidents. MY distrust is also based on 25 years of responding to medical calls. And it is also based my wife's experiences as a medical professional. Marijuana is very bad news. It causes all sorts of problems that are never ever mentioned in any of these forums.
One of the most notable non-mentioned problems is a breakdown of the vascular systems that has been noted by many physicians. Heavy marijuana users almost always develop varicose veins and other problems relating to weakened blood vessels. It is not known why but theorized that it has something to do with repeated dilation of blood vessels. It also causes issues with muscle and the lymph system. One would assume that this would be associated with an increase in the risk of stroke and aneurism and some studies have suggested this, but further research is needed.
Other serious issues are psychological and dependency problems which anyone who has ever known a heavy pot smoker can attest to. Most heavy users would rather have an arm or a leg chopped off as opposed to giving up marijuana. Yet they claim it is not addictive??? Ha, ha, ha!!! Do you find tobacco users, alcoholics, other drug addicts, or even people who eat too much junk food trying to convince others that what their vices are good for them? It is only marijuana users who do this and I think that it is the ultimate irony.
The survey that this thread is based on says only that 92% of those surveyed favor further research. I favor further research. Any substance that is abused as much by such a large number of people should be studied further so that its negative repercussions can be better documented... Because of that the potheads here would claim that even I am for "full legalization".