Thanks to MF: The Washington Post, June 24, 1996. Dear Ann Landers: You have recently printed letters from people whose spouses have left them for people they met on the Internet. As a 55-year-old who has been happily married for 33 years, I am living proof that the vast majority of us Internet fans use our computers to browse newspapers, see the treasures of the Sistine Chapel, check the weather in Vermont or read the latest Batman comic. I think your readers should be assured that almost all Americans on-line have no intention of stealing someone else's spouse or leaving their own. Just as reckless and irresponsible drivers should not ruin it for drivers who act responsibly, neither should a few bored Web crawlers foul up the Internet for the rest of us. -- Sen. Patrick Leahy (D Vt.) Dear Pat: You are a superb senator. Vermont is lucky to have you. As an advice columnist, however, you aren't so hot. Granted, most Web crawlers are fairly decent people, but many are not interested in the Sistine Chapel or Batman. The Internet is tailor-made for con men, the lonely and the bored. The word from here is beware. More on this subject tomorrow. [Ann's two letters today exemplify the grief and joy of betrayal and love on the Net.] Questions may be sent to: Ann Landers, c/o Creators Syndicate, 5777 W. Century Blvd., Suite 700, Los Angeles, Calif. 90045.