Managers make a lot mistakes. Some come from inexperience. Others reflect lack of knowledge. And some are just dumb. But few mistakes could be considered as stupid as what managers of home security company Alarm One, Inc., did. As part of a "team building" excercise, employees were paddled with rival companies yard signs as part of a contest that pitted sales team against one another. the winners threw pies at the losers, fed them baby food, made them wear diapers, and yes spanked them.