Or were they predisposed to disease?
Did longevity run in their families or did all their antecedents die relatively young?
What other risky behaviors did they engage in? Strike that. If they hung around with you, you were probably all huddled together outside City Hall crying, "Help us! Help us! We're to weak to leave smoking bars on our own! Help us!"
I've seen those tattoos and bumper stickers, "No Fear", yours probably reads, "No Risk".