I've found 2 thoughts on woad:
1) that it is a hallucinogenic compound that sends people into berzerker frenzies or psychic overdrive
2) that it is a pretty color and any psychoactive effects come from either a placebo effect, or other substances mixed in with the woad.
Does anyone have any real information on this? I have a bad history with psychoactives and would not like to repeat some of my crazier times.