GUIDANCE         There's invisible lines drawn in the sand of social intercourse, and trespassing onto the turf on the wrong side of them can feel like criminal trespass on physical property. Some people have a code that they feel impels them to take offense, and they are usually proud of it. Some people have thin skin like an onion. Sometimes you are remiss if you don't 'stand up for your position' or 'defend yourself.' So sometimes you have to act like you care that you have been insulted when...