If you only buy drugs from friends, you will get the pure stuff. Illegal drugs are often messed with on the street. No one can know what is really in them. Marijuana is less likely to be adulterated than any other illegal drug, but the only example of adulteration that they give is for marijuana. You have to use drugs for a long time before they can really hurt you.
Drugs can cause the brain to send the wrong signals to the body.
This can make a person stop breathing, have a heart attack, or go into a coma. This can happen the first time a drug is used. Again, true enough, but not about marijuana. Marijuana is almost the only drug that cannot cause a fatal reaction. Eight of the ten questions are about marijuana.