Should FIDE adopt a strict doping control?

 (...)Psychoactive substances are used by humans for a number of different purposes to achieve a specific end. These uses vary widely between cultures. Some substances may have controlled or illegal uses while others may have shamanic purposes, and still others are used medicinally. Other examples would be social drinking or sleep aids. Caffeine is the world's most widely consumed psychoactive substance, but unlike many others, it is legal and unregulated in nearly all jurisdictions. In North America, 90% of adults consume caffeine daily.^[12]

Psychoactive drugs are divided into different groups according to their pharmacological effects. Commonly used psychoactive drugs and groups:

• Anxiolytics

Examples: Alcoholic beverages (ethanol)

• Euphoriants

Examples: Alcoholic beverages (ethanol)

• Hypnotics/sedatives

Examples: Alcoholic beverages (ethanol)

• Stimulants ("uppers"). This category comprises substances that wake one up, stimulate the mind, and may even cause euphoria, but do not affect perception.

Examples: coffee, tea, tobacco, coca, amphetamine, phenethylamine, cocoa, guarana, maté, ephedra and khat.

• Depressants ("downers"), including sedatives, hypnotics, and narcotics. This category includes all of the calmative, sleep-inducing, anxiety-reducing, anesthetizing substances, which sometimes induce perceptual changes, such as dream images, and also often evoke feelings of euphoria.

Examples: Alcoholic beverages (ethanol), opioids, barbiturates, benzodiazepines.

• Hallucinogens, including psychedelics, dissociatives and deliriants. This category encompasses all those substances that produce distinct alterations in perception, sensation of space and time, and emotional states.

Examples: psilocybin, LSD, Salvia divinorum and nitrous oxide.

Marijuana is an example of a psychoactive drug that combines properties of each of these groups.(...)

http://en.wikipedia.org/wiki/Psychoactive_drug

In any case, do you believe there are many competitive chessplayers who are serious about psychoactive drugs?

Marijuana should defiantely be banned. Youth are becoming stunner all the time on that stuff. Not good for chess.