NORTH MANKATO, Minn. --Here, the bubbles runneth over. A park fountain in this southern Minnesota town has been hit by suds-dumping pranksters at least 10 times in the past few months. And now, city officials are in a lather. "Baby-sitting a fountain just isn't a good use of our time," said police Capt. Wayne Hoffman. Every time the fountain is "soaped" -- as the police and parks workers call it -- several clean up and repair jobs must get done. The fountain has to be turned off and drained. Then the inside of it and the water-circulating lines must be...