Aug. 27, 2004 — The Republican National Convention hasn't started yet, but both opponents and supporters are already engaging in treachery and double-dealing worthy of Spy vs. Spy. Don Hajicek, a 36-year-old graphic artist from Wyoming, was planning to travel 2,000 miles to New York City to join the anti-GOP protests and stay at an apartment belonging to a sympathetic New Yorker. But then he learned that the person who had offered him accommodation had tricked him, and the shelter he had been promised was a lie. When planning his trip, Hajicek found an offer of housing on an Internet...