From Church of Illuminati

Dangerous drug, should not be used by anyone before the age of 21. Kills more people worldwide than alcohol and tobacco combined.

It would definitely be banned if it was invented today.

Effects

Hallucinations, sexism, anti-scientific behavior, ignorance, IQ loss, homophobia, xenophobia, technophobia, social conformity, mob behavior, moral panic, terrorism and murder.

Withdrawal

Religion withdrawal can be very difficult, and require high intelligence and will power.