Hacks, Viruses, Scams & Spam Virus writers trade insults as e-mail users suffer Some 20 variants spreading across Net at furious rate By Bob Sullivan Technology correspondent MSNBC Updated: 3:31 p.m. ET March 03, 2004 With 20 variations of the Mydoom, Netsky and Bagle viruses circulating around the Internet, it's becoming clear that computer virus writers are engaged in some kind of can-you-top-this game. And it's Internet users who are suffering collateral damage. advertisement E-mail inboxes around the world are teeming with cryptic notes that have simple messages like "Here is the file," or "I want a reply." When antivirus...