In Cajun families, we do three things when people leave. We kiss them, we hug them and we say, "Be careful." I don't know why we feel the need to tell people to "be careful." For the most part, most people want to be careful. Some people enjoy living life on the edge as they jump off bridges and climb mountains but I think, for the most part, they are also trying to be careful as they do these ridiculous things.
I wonder if I've prevented an accident with my inevitable "be careful." I wonder if one of my friends or family (or, who am I kidding, I even say it to total strangers) have been on the verge of doing something reckless and thought, "Oh wait a minute. Laurie said 'be careful.' I better not drive off that bridge. Whew, that was close."