Although freely available in Japanese restaurants (including free refills!), this substance is highly dangerous and clearly addictive to anarchists and other creatures of this genus. You can literally see the destruction of brain cells. The addict repeatedly returns to the substance in spite of severe physical and mental trauma caused by its consumption.
Ok, fine, I must admit, in my distant youth I have also on occasion committed substance abuse involving Wasabi. You can put the cuffs on me now and take me away :(.