By Rory Carroll SAN FRANCISCO - Ten years ago, when San Francisco's AT&T Park became the first sport's stadium to offer free Wi-Fi to fans, it was considered a novelty. Fewer than 100 people connected to the network per game that first season, and those that did, did not necessarily endear themselves to their fellow Major League Baseball fans. "Back then, people would kind of laugh at you if were using your laptop and popped in a Wi-Fi card (during a game)," said Bill Schlough, senior vice president & chief information officer for the San Francisco Giants. ...