The only ones I ever bothered to talk to were actually pretty patient and nice, although one of them kept embarrassing herself by saying dumb things, to the irritation of the other. I just engaged them because I was curious where they come from...like, are they college students, robots, what? I've never met one anyplace other than behind a table outside a post office or grocery store.
The ones I met were really weird, but also impossible to argue with. LaRouche followers know their s**t about their belief system due to the indoctrination, and they are pedantic as hell.