When it comes to ATMs -- the Y2K bug is dead . . . at least that is the message the nation's largest ATM networks want to get out. This month the ATM network operators will begin affixing special "Y2K Bug" stickers to ATMs nationwide to show that they have exterminated the Y2K bug. But the same group cautions consumers not to withdraw excessive quantities of cash from financial institutions or from ATMs. The leading ATM network operators say that they will be on duty continuously in special operations centers at their respective headquarters to monitor the 2000 date roll around the globe. Furthermore network representatives will initiate ATM transactions in New Zealand just across the international dateline to assure system functionality. While the Y2K bug may have been squashed it appears the bigger threat is the consumer bug.