It sounds like the very wildest sort of tinfoil-hattery (that's where I saw mention) but it doesn't exactly debunk. E.g.:
The patient is often disoriented to time and place. Disturbances in judgment and insight appear. The patient may abandon socially imposed restraints and resort to vulgar and inappropriate behavior. Perceptual clues may no longer be readily interpretable, and the patient is easily distracted and may have memory loss, most notably short-term memory. In the face of these deficits, the patient still tries to make sense of his environment and will not hesitate to make up answers on the spot to questions that confuse him.But there's good, good news: it apparently doesn't send the affected into a berserk rage. Naw, merely, "...behavioral lability, with patients swinging back and forth between quiet confusion and self-absorption in hallucinations, to frank combativeness." Oh, that's fine, then.
Based on the described effects, I suspect Hollywood is saturated with it -- and perhaps Washington, DC, too.