I've noticed a trend in the behavior of some online poker players since about a month ago, when I returned to free online play for the first time since Black Friday. That trend is calling someone an idiot or some other mildly derogatory name, when they're having a bad night, or after they've lost one hand.  I don't understand this.  I don't call someone an idiot when I take their money, whether we're playing for real money or play money or Hog Bucks or league points.  I've never seen anyone…