] The flood of unsolicited messages sent over the Internet ] is growing so fast that spam may soon account for half of ] all U.S. e-mail traffic, making it not only a ] hair-pulling annoyance but also an increasing drain on ] corporate budgets and possibly a threat to the continued ] usefulness of the most successful tool of the computer ] age. ] ] Spam continues to defy most legal and technical efforts ] to stamp it out. The surge has spurred calls for national ] legislation, but deep divisions remain regarding what ] constitutes spam and how best to regulate it. In the ] meantime, spammers, Internet providers, company network ] administrators and anti-spam vigilantes are locked in a ] ferocious electronic arms race. ] ] Many spammers have become so adept at masking their ] tracks that they are rarely found. They are so ] technologically sophisticated that they adjust their ] systems on the fly to counter special filters and other ] barriers thrown up against them. They can even ] electronically commandeer unprotected computers, turning ] them into spam-launching weapons of mass production. ] ] "The spammers are evil folks," said Matt Korn, America ] Online Inc.'s vice president for network operations. "As ] hard as we're working, they are working 24 hours a day. ] That's the level to which this battle has escalated." Spam's cost to business escalates |