I've met some before, knew one's son very well back in high school. They did sheet up for their little late-night get-togthers, and once in a blue moon there'd be a half-dozen of them dressed up in the paper protesting some damn' thing or other (Probably bussing, but since I rode a bus anyway to the county's one big consolidated high school, it was an issue with no personal effect on me whatsoever). I never saw any of them in sheets, though, in a first-person in-the-flesh sense.