I find this advice very irresponsible. Datura can completely disorient someone to the point where they can and often will endanger themselves. Before taking make sure you do some solid research. Read over some trip reports on Erowid and you'll see that its no walk in the park.
Datura is a deliriant, not a psychedelic. It should not be compared to LSD or shrooms.
"Although exposure is sometimes unintentional by gardeners or farmers, its toxic effects are seen most commonly in teens, who intentionally misuse it for its hallucinogenic and euphoric effects, while presenting with serious illness or death from its anticholinergic properties."
"All parts of the plant are toxic. They are ingested, smoked and absorbed topically especially through mucous membranes. The exact concentration of specific alkaloids varies with species, cultivation, environment, temperature, moisture, and storage. The range of toxicity is highly variable and unpredictable; toxicity may vary from leaf to leaf, plant to plant and season to season. This contributes to the danger of misuse of the plant since the dose cannot be predicted.(5,7) The highest concentration occurs in the seeds: approximately 0.1 mg of atropine per seed or 3-6 mg/50-100 seeds.(4) An estimated lethal dose in an adult is >10 mg atropine or >2-4 mg scopolamine.(5)"
"The onset of symptoms occurs within 30 to 60 minutes after smoking leaves or drinking tea; and 1-4 hours after ingestion of plant material or seeds.(4) Initial symptoms include dry mouth then pupil dilatation.(2) The duration of symptoms is often 24-48 hours because of delayed gastrointestinal motility; symptoms have been reported to last up to 1-2 weeks.(4,5) Although poisoning may lead to fatal medullary paralysis, arrhythmias and cardiovascular collapse,(

Jimson Weed-related deaths mainly are as a result of impaired judgment and coordination resulting in risk-taking activities associated with accidental death.(1,2)" from
http://www.erowid.org/plants/datura/datura_info5.shtml
Rampage... you should be a little more careful about what you try to influence people to try. Not cool.